standards of roadway geometric design ...westfield standards – 3/17 02501-1 section 02501 -...

Westfield Standards – 3/17 02501-1

SECTION 02501 - STANDARDS OF ROADWAY GEOMETRIC DESIGN PART 1 – GENERAL 1.1 The Indiana Design Manual (IDM) in conjunction with the AASHTO Green Book

for Geometric Design, latest versions, shall govern if their standards are more stringent than what is outlined and specified below.

1.2 Secondary Plats shall conform to the following requirements and standards:

A. Minimum Roadway Cross Section Width

1. Minimum roadway cross section widths, to be installed at the subdivider’s expense, shall be as follows: a. Primary Arterials, Per Westfield Thoroughfare Plan

generally described as follows: 150 feet of right of way, four (4) lanes at 12 feet, 16 feet center turn lane and/or divided grass landscaped median, plus two (2) feet curb and 6 inch and gutter and two (2) 8 foot asphalt multi-use trails. Reference the most current Westfield Thoroughfare Plan.

b. Secondary Arterials, Per Westfield Thoroughfare Plan

generally described as follows: 120 feet of right of way, four (4) lanes at 12 feet, or two (2) lanes at 12 feet plus 16 feet center turn lane and/or divided grass landscaped median, plus two (2) feet and 6 inch curb and gutter and two (2) 8 foot asphalt multi-use trails. Reference the most current Westfield Thoroughfare Plan.

c. Collector Streets, Per Westfield Thoroughfare Plan

generally described as follows: 100 feet of right of way, 36 feet back of curb to back of curb (2 feet and 6 inches curb and gutter) and two (2) 8 foot asphalt multi-use trails. Reference the most current Westfield Thoroughfare Plan.

d. Local Streets: 31 feet back of curb to back of curb (2 feet

curb and gutter). See Westfield Standard Drawing (WSD) 02501-001.

e. Subdivision Streets: Per WSD 02501-001 and 002.

f. The pavement of a turning circle at the end of cul-de-sacs

shall have a minimum outside diameter of 84 feet for local cul-de-sacs and 100 feet for all others. Cul-de-sacs with an island shall not be permitted.


g. Frontage Roads: Per WSD 02501-003.

h. Alleys: Per WSD 02501-010.

i. In all commercial areas, the minimum pavement width shall be 42 feet back of curb to back of curb or as approved by variance by the WPWD Engineer.

2. All streets shall be designed to the standards herein. Inverted

crowns shall not be permitted which includes private streets.

3. In all industrial areas, the minimum pavement width (excluding curb and gutter) shall be 24 feet with 8 feet of shoulder on each side of the pavement with "No Parking" on the shoulders.

4. Street trees shall not be within 4 feet of any curb, sidewalk, or trail. All trees and shrubs shall properly match the most current City of Westfield Parks Department Master Tree and Shrub List.

B. Street Grades, Curves, and Sight Distances

1. The minimum vertical grade for all streets shall be 0.5%. 2. Maximum Vertical Grades

a. The maximum vertical grade for Primary Arterials and

Secondary Arterials shall be 5%. b. The maximum vertical grade for Collectors shall be 8%.

c. The maximum vertical grade for Local Roads or Streets

shall be 8%.

d. The first 25 feet of an intersecting roadway, from the outer edge of a through roadway, shall be designed with a two percent (2%) downward grade. With a sag vertical curve situation, the two percent grade shall connect with the remaining street profile grade using a minimum vertical curve length of 50 feet. This sag vertical curve may start at the edge of the through roadway. With a crest vertical curve at the approach to an intersection, the two percent downward grade shall extend 25 feet from the edge of the through roadway and the crest vertical curve can begin at that point. The length of the crest vertical curve shall meet the requirements of the latest AASHTO Standards for crest vertical curves. Variances from this provision shall require a Spot Elevation Detail to be reviewed and approved by the WPWD Engineer. No standing water will be allowable at


intersections. ADA/PROWAG specifications shall be met at all intersections and other pedestrian crossing areas.

3. Vertical curves shall be designed to meet or exceed the latest

AASHTO Standards for sag and crest vertical curves, sight distance, vertical clearance, and any other geometric guideline associated with vertical design.

4. Horizontal alignments shall be designed to meet or exceed the latest AASHTO Standards for curve radii, sight distance, superelevation, tangent length between two radii, and any other geometric guideline associated with horizontal design.

5. All AASHTO Standards shall correspond to the following design

speeds: a. Local Roads or Streets shall have a design speed of 25

mph.

b. Collectors shall have a minimum design speed of 35 mph. Consult with the WPWD Engineer for further guidance.

c. Primary Arterials and Secondary Arterials shall have a

minimum design speed of 40 mph. Consult with the WPWD Engineer for further guidance.

6. Each cul-de-sac shall have a terminus of circular shape with

minimum right-of way diameter of 108 feet for residential use and 120 feet for industrial use (variance alternative is 2 times the radius for the length of the street). Refer to WSD 02501-012 for additional details.

C. Intersections

1. At street and alley intersections, property line corners shall be rounded by an arc, the minimum radius of which shall be 20 and ten (10) feet respectively. A tangential chord may be substituted for such arc.

2. Street curb intersections shall be rounded by radii of at least 25

feet. A radius of 40 feet shall be used at the intersection with a Primary Arterial, Secondary Arterial or Collector street.

3. The above minimum radii shall be increased when the angle of

street intersection is less than 90 degrees. AutoTurn exhibits may be required if a special design vehicle needs to be accommodated at the discretion of the WPWD Engineer.


4. Intersections of more than two (2) streets at one point will not be allowed.

5. Street jogs with centerline offsets of less than 125 feet shall not be

permitted.

6. All streets shall intersect at 90 degrees whenever possible for a minimum distance of 100 feet; however, in no instance shall they intersect at less than 80 degrees onto Primary Arterials, Secondary Arterials, or Collectors; or at less than 70 degrees onto Local Roads or Streets.

7. The following paragraphs shall be required as provisions of

restrictive covenants of all Secondary Plats to which they apply:

a. No fence, wall, hedge, tree or shrub planting which obstructs sight lines and elevations between three (3) and nine (9) feet above the street shall be placed or permitted to remain on any corner lot within the triangular area formed by the street right-of-way lines and a line connecting points 40 feet from the intersection of said street lines 40 feet for Collectors and Local Roads and Streets; and 75 feet for Primary Arterials and Secondary Arterials, or in the case of a rounded property corner, from the intersection of the street right-of-way lines extended.

b. The same sight line limitations shall apply to any lot within

ten (10) feet of the intersection of a street right-of-way line with the edge of the driveway pavement or alley line. No driveway shall be located within 75 feet of the intersection of two streets, unless otherwise approved in writing by the WPWD Engineer.

8. At the intersection of any proposed Subdivision Road, Local Road, Street or Drive with a Primary Arterial, Secondary Arterial, or Collector, acceleration and deceleration lanes, passing blisters or left turn lanes shall be provided on the Primary Arterial, Secondary Arterial, or Collector. Reference Figure 02501-013.

9. The design of roundabouts shall follow the manual below:

a. Federal Highway Administration NCHRP Report 672 “Roundabouts: An Information Guide” Second Edition Indiana Design Manual or most current edition.


D. Easements

1. Where alleys are not provided, easements for utilities shall be provided. Such easements shall have minimum widths of 20 feet, and where located along lot lines, one-half the width shall be taken from each lot.

2. Where a subdivision is traversed by a watercourse, drainage ditch,

channel, or stream, adequate areas for storm water or drainage easements shall be allocated for the purpose of widening, deepening, sloping, improving or protecting said watercourses in accordance with the requirements of the Hamilton County Drainage Board, WPWD, and other governing bodies that have jurisdiction over these water courses.

3. The Subdivider shall be encouraged to design for the placement of

utility lines underground, following the required standards and specifications established by each utility company. The location of each underground utility system shall be shown by appropriate easement lines on the proposed plat.

E. Obstruction Free Zones

The obstruction free zone is defined as the roadside area next to the travel way which shall be free from hazards and obstructions. Obstacles within the obstruction free zone limits shall be removed, made breakaway, or shielded with guardrail. The obstruction free zone values given below are minimums and shall be extended where accident experience indicates a wider zone would further enhance safety. The following obstruction free zones apply to roadway projects:

1. Rural and Urban Arterials with Shoulders. Where the design speed is 50 mph or greater and the design ADT is over 1500, the minimum obstruction free zone is 20 ft from the edge of the through traffic lanes or to the right-of-way line, whichever is less. For roadways where the design speed is less than 50 mph, and the design ADT is less than 1500, the minimum obstruction free zone from the edge of through traffic lanes is 10 ft plus the usable shoulder width provided, or to the right-of-way line, whichever is less.

2. Rural and Urban Collectors with Shoulders. Where the design

speed is 50 mph or greater and the design ADT is over 1500, the minimum obstruction free zone from the edge of the through traffic lanes is 10 ft plus the usable shoulder width provided, or to the right-of-way line, whichever is less. For Roadways where the design speed is less than 50 mph and design ADT is less than 1500, the minimum obstruction free


zone from the edge of through traffic lanes is 6.5 ft, plus the usable shoulder width provided, or to the right-of-way line, whichever is less.

3. Rural and Urban Local Roads and Streets with Shoulders. The

minimum obstruction free zone from the edge of the through traffic lane is 6.5 ft plus the usable shoulder width provided, or to the right-of-way line, whichever is less.

4. Curbed Roadways. Where curbs are 6 in. or higher and the

posted speed limit is less than 50 mph, the minimum obstruction free zone from the face of the curb shall be 1.6 ft. However, for traffic signal supports the minimum obstruction free zone shall be 2.6 ft. Where the curbs are less than 6 in. in height or the posted speed limit is 50 mph or greater regardless of curb height, the minimum obstruction free zone will be the same as defined in Items A, B, or C above.

5. Appurtenance-Free Area. Roadways for all functional

classifications shall have a 1.6 ft appurtenance-free area from the face of curb or from the edge of the travel lane if there is no curb. For traffic signal supports, a 2.6 ft clearance shall be provided. The appurtenance free area is defined as a space in which nothing, including breakaway safety appurtenances, shall protrude above the paved or earth surface. The objective is to provide a clear area adjacent to the roadway in which nothing will interfere with extended side-mirrors on trucks, with the opening of vehicular doors, etc.

6. On-Street Parking. The following obstruction-free zone

requirements will apply to facilities with on-street parking.

a. Continuous 24-Hour Parking. No obstruction-free zone is required on facilities where there is continuous 24-hour parking, except that the appurtenance-free area as shown in Figure 55-5A shall be provided from the face of the curb or edge of the parking lane if there is no curb.

b. Parking Lane Used as a Travel Lane. The obstruction-

free zone shall be determined assuming the edge of the parking lane as the right edge of the farthest right travel lane.

7. The designer shall eliminate or modify the following hazards, according to the above treatments, if they are within the obstruction free zone:


a. Tree Removal. Trees that will mature to a diameter of 4

in. or more shall be removed from the obstruction free zone, unless shielded by a protective device required for other purposes. Trees on back slopes may generally remain if they are unlikely to be impacted by errant vehicles.

b. Obstructions. Obstructions within the obstruction free

zone, such as rough rock cuts, boulders, headwalls, foundations, etc., with projections that extend more than 4 in. above the ground line shall be removed, relocated, made breakaway or shielded with guardrail as appropriate. A rough rock cut is one that presents a potential vehicular snagging problem.

c. Sign and Light Supports. Sign posts and light poles to

remain within the obstruction free zone will be made breakaway. In urban areas where pedestrian traffic is prevalent, breakaway light supports shall not be used. However, these supports should, as a minimum, be offset beyond the obstruction free zone value as presented in Section 02501 – 1.1 – E or desirably behind the sidewalk. In other areas where pedestrian traffic is prevalent, the use of breakaway supports will be considered on a case-by-case basis by the field review team.

d. Traffic Signals. Traffic signal supports shall be placed

to provide the obstruction-free zone through the area where the traffic signal supports are located. However, the following exceptions will apply:

i. Channelized Islands. Installation of signal

supports in channelizing islands shall be avoided, if practical, however, if a signal support must be located in a channelizing island, a minimum clearance of 30 ft shall be provided from all travel lanes (including turn lanes) in rural areas and in urban areas where the posted speed is greater than 45 mph. In urban areas where the island is bordered by a barrier curb and the posted speed is 45 mph or less, a minimum clearance of 10 ft shall be provided from all travel lanes (including turn lanes).

ii. Non-Curbed Facilities (Posted Speeds ≥ 50 mph

and ADT > 1500). Where conflicts exist such


that the placement of the signal supports outside of the obstruction-free zone is impractical (e.g., conflicts with buried or utility cables), the signal supports shall be located at least 10 ft beyond the outside edge of the shoulder.

iii. Non-Curbed Facilities (Posted Speeds < 50 mph

or ADT ≤ 1500). Where conflicts exist such that the placement of the signal supports outside of the obstruction-free zone is impractical (e.g., conflicts with buried or utility cables), the signal supports shall be located at least 6.5 ft beyond the outside edge of the shoulder.

e. Culverts. Culvert ends are considered to be within the

obstruction free zone if the point at which the top of the culvert protrudes from the slope is within the obstruction free zone. Transverse Slopes on Side Roads and Private Drives. Steep transverse slopes on side roads and private entrances shall be considered for flattening, if practical. Desirably these slopes shall be 6:1 or flatter, but in no case shall they be steeper than 4:1. Transverse slopes on median crossovers will be 10:1 or flatter.

f. Curbs. Curbs shall generally be removed on rural

highways where posted speeds are greater than 45 mph. The proper placement of traffic control devices must be considered in reviewing the removal of corner island curbs where such devices are located. This item is not intended to cover divisional (channelizing) islands separating two-way traffic or curbs at the edge of shoulder for drainage. In the latter two cases, sloping curbs shall be used on highways with posted speeds greater than 45 mph. Curbs higher than 4 in. shall not be used in conjunction with guardrail. The face of curbs, used in conjunction with guardrail, shall desirably be behind the face of the rail. If this cannot be achieved, the face of the curb may be located flush with the face of the rail.

g. Utility Poles. Utility poles within the obstruction free

zone which are not owned by the City of Westfield or INDOT often constitute a significant hazard and shall be removed or relocated outside of the proposed right of way as to not interfere with any proposed or existing sidewalk or trail. Additional easements for utility poles outside of the right of way may be required by the


utility company. Utility companies shall be requested to relocate utility poles that are located in high vulnerability areas such as channelizing islands, or where the accident history indicates there has been a utility pole accident problem. The WPWD, based on their judgment, will determine where such work is warranted.

h. Utility Pedestals. Existing utility pedestals shall be

removed or relocated outside of the proposed right of way as to not interfere with any other utilities. New utility pedestals shall be placed outside of the proposed right of way and shall be installed as to not interfere with any other utilities.

i. Non-Traversable Hazards. Fill slopes steeper than 1:1

with a height greater than 2 ft within the obstruction-free zone shall be flattened to the extent practical. If any part of a drainage ditch appears within the obstruction-free zone, it shall be relocated.

F. Roadside Safety

a. All new guardrail placed within the City of Westfield shall be timber per WSD 2501-017. See specifications below:

i. All timber shall be AWPA copper naphitenate treated as per current state and/or AASHTO specifications.

ii. All timber to be graded as per NFPA 1991 National Design Specifications for Wood Construction.

iii. Rail posts to be douglas fir-larch, No. 1, Post & Timber. iv. 4” x 10” & 4” x 4” railing to be douglas fir-larch, No. 1 SIS. v. Balance of timber to be douglas fir-larch, in accordance with

design requirements. vi. All timber is rough unless otherwise noted.

vii. All timber cut or drilled in field shall be treated with an approved preservative.

viii. All hardware to meet ASTM A307-97 and all structural steel to meet ASTM A36, except as noted. All to be galvanized as per current state specifications and/or AASHTO material specifications.

ix. Construction requirements shall conform to INDOT state standards.

x. All timber to be cut to exact length, dressed to size required, and all practical framing to be done prior to treatment.


b. Construction requirements:

i. All holes drilled in field where spikes are used are to be 1/16”

smaller than spike size. ii. Holes drilled for bolts are to be 1/16” larger than bolt size.

iii. Holes drilled for ¾” lag bolts are to be 9/16” in diameter for the threaded portion of the bolt and 13/16” for the shank portion.

iv. Any nut or machine bolt head in direct contact with the timber shall have one plate washer between nut & timber, or bolt head & timber.

v. Any nut or machine bolt head in direct contact with the steel shall have one cut washer between nut & steel, or bolt head & steel.

vi. Set threads on all bolts at nut with a center punch after tightening.

c. For additional design details regarding roadside safety measures, refer to Indiana Design Manual Chapter 49.

G. Bridges

a. The design of vehicular bridges shall follow the manual below:

i. AASHTO LRFD Bridge Design Specifications 6th Edition with

2013 Interim Revisions or most current edition.

ii. The design of pedestrian bridges shall follow the manuals below:

1. AASHTO LRFD Guide Specification for the Design of

Pedestrian Bridges 2nd Edition or most current edition.

2. AASHTO Guide for the Development of Bicycle Facilities Fourth Edition or most current edition.

PART 2 - PRODUCTS

Not Applicable

PART 3 - EXECUTION Not Applicable


PART 4 – FIGURES 4.1 STANDARD GENERAL DETAILS FIGURE DESCRIPTION 02501-001 Typical Cross Section – Local Street 02501-003 Typical Cross Section – Frontage Road 02501-010 Typical Cross Section – Local Alley 02501-013 Minimum Subdivision and Commercial Entrance 02501-015 Residential Driveway 02501-016 Sight Triangle Details 02501-017 Timber Guardrail Details END OF SECTION 02501

2/26/16

FIGURE 2501-001

NOTES: 1. The curb & gutter shall be Type I or Type II as shown on the Curb & Gutter standard

sheets. Type II curb & gutter shall be used adjacent to, and in, non-residential or multi-family

residential areas and on entrances of residential development along thoroughfares.

1/4 in/ft

(TYP)

1/2 in/ft

3:1 m

ax.

3:1 max.

R/

W

R/

W

1' 1'

1/4 in/ft

TYPICAL SECTION - LOCAL STREET

5'-0"

59'-0"

31'-0"8'-0"

3. 8'-0" tree buffers are required for all local streets. Refer to the City of Westfield street tree planting

5'-0"8'-0"

1/4 in/ft

specifications for additional details. For approved species, see Master Tree List.

TILE REQ'D. (TYP)

PERFORATED DRAIN

SMOOTH BORE,

DOUBLE WALL, GASKETED

TILE REQ'D. (TYP)

NON-PERFORATED DRAIN

SMOOTH BORE,

DOUBLE WALL, GASKETED

SIDEWALK

TYPICAL CROSS SECTION: LOCAL STREET

2. For curb and gutter detail, see Figure 2500-008

CITY OF WESTFIELD

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NOTES: 1. The curb & gutter shall be Type I or Type II as shown on the Curb & Gutter standard

sheets. Type II curb & gutter shall be used adjacent to, and in, non-residential or multi-family

residential areas and on entrances of residential development along thoroughfares.

PERIMETER TRAIL

3:1 m

ax.

3:1 max.

R/

W

1' 1'

1/4 in/ft

TYPICAL SECTION - RESIDENTIAL FRONTAGE ROAD

8'-0"

44'-0"

13'-0" 5'-0"5'-0"

3. Refer to the current Westfield Thoroughfare Plan Section 5.1 for the typical cross sections for

Collector, Secondary Arterial, and Primary Arterial.

COMMON

AREA

1/4 in/ft

1/2 in/ft

(TYP)SIDEWALK

1/4 in/ft

1/2 in/ft

(TYP)

5. For street tree applications, buffers should be widened to 10'-0". Add'l R/W Req'd.

R/

W

MJR.

RDWY.

6. Common Area width varies depending on landscaping plan, utilities, and other incidentals. 10' min.

For two-sided on-street parking applications, back-of-curb to back-of-curb width shall be

widened to 38'-0". Add'l R/W Req'd.

R/

W

1/4 in/ft

8'-0"

Scale: NTS

11'-0"

PRKG.

1'

2/26/16

TYPICAL CROSS SECTION: RESIDENTIAL FRONTAGE ROAD

FIGURE 2501-003

2. For curb and gutter detail, see Figure 2500-008. For perimeter trail detail, see Figure 2505-001

4. For residential applications, see Figure 2500-001 for pavement section details.

For mixed-use or commerical applications, see Figure 2500-002 for pavement section details.

CITY OF WESTFIELD

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2/26/16

FIGURE 2501-010

TYPICAL CROSS SECTION: LOCAL ALLEY

NOTES: 1. If hydrants located in alley, pavement section shall be widened to 20'-0". Add'l R/W Req'd.

Designer to handle drainage accordingly.

3. Pavement may be crowned or sloped to one side, no inverted crowns.

4. If two-way traffic is allowable, pavement shall be widened to 20'-0". Add'l R/W Req'd.

outside of the access easement/right-of-way.

5. If utility, drainage or any other easements required, min. 10'-0" easements shall be added

TYPICAL SECTION - LOCAL ALLEY

Scale: NTS

2'-0" 16'-0" 2'-0"

Ease

ment

or

R/

W20'-0" Access Easement or R/W

Ease

ment

or

R/

W

2. For residential applications, see Figure 2500-001 for pavement section details.

For mixed-use or commerical applications, see Figure 2500-002 for pavement section details.

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70'

120'

36'

2/10/17

31'

R/W AS REQUIRED FOR GRADING AND DRAINAGE

40'R

R/W VARIESR/W VARIES

R/

W R/

W

40'R

R/

W

R/

W

20:1

TA

PE

R

20:1

TA

PE

R

L

12' NEW ACCELERATION AND DECELERATION LANE

EXISTING LANE OR LANES

NOTES:

CONSTRUCTION PLANS SHALL

INCLUDE CENTERLINE PROFILE

OF THE EXISTING ROAD BEING

INTERSECTED BY THE ENTRANCE.

THE PROFILE SHALL EXTEND A

MINIMUM OF 500' EACH DIRECTION

FROM ENTRANCE CENTERLINE.

NOT TO SCALE

* *

100' ARTERIAL & COLLECTOR

50' LOCAL

12' PASSING BLISTER

75'

B C

C

C

A

24'

150' ARTERIAL

100' COLLECTOR

75' LOCAL

*2' CURB & GUTTER

PASSING BLISTER WHEN REQUIRED

LANE WIDENING SHALL MATCH EXIST. PAVEMENT SURFACE TYPE

A

B

C

**

BEYOND IN BOTH DIRECTIONS

PAVEMENT LIMITS AND AND 50'

CENTERLINE WITHIN ALL NEW

MILLED AND RESURFACED TO

EXIST. ROADWAY SHALL BE

75'

MIN. SUBDIVISION AND COMMERCIAL ENTRANCE

C

DRIV

E

EN

TR

AN

CE

59'

FIGURE 2501-013

NEW PAVEMENT

RESURFACE

1-1/2" MILL &

DATE

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2/12/16

RESIDENTIAL DRIVEWAYS

4. Sidewalks shall be constructed in accordance with the appropriate standard and shall be continuous

2. Metal or Concrete end section shall be constructed on all pipes.

PRIVATE DRIVE WITH OPEN DITCHES

12' Wide Min.

Conc.

Flowline Elev. Every 20'

12' Wide Min.

CURB AND GUTTER WITH SIDEWALK

PRIVATE DRIVE WITH ROLLED

Concrete

6" Plain

30' Wide Max. for Zoning Class SF2

across the driveway.

GENERAL NOTES



1/2" Preformed Joint Filler

Required for Concrete Drives Only

Standard Roll Curb

5' Conc. Sidewalk

Invert. Elev.

Drainage Area Above

Pipe (If Known)

End Sections

15'

RMin.

1'-0"


Existing Pavement

12" Min. Diam. for R.C.P.

15" Min. Diam. for C.M.P.

Pavement Elevation to Match

CL

15'

R

Min.

(Min. 16 Gauge)

Invert. Elev.

2'-0"

MIN

R.O.W.

5'

20' Wide Max. for Zoning Class SF55.

30' Wide Max. for Zoning Class AG-SF-1

See Note 5

for Max. Width

for Max. Width

See Note 5

12' Wide Min.

Thru Curbs at Radius Points


5' Conc. Sidewalk

15'

RMin.

Concrete at Driveway

Sidewalk Shall Be 6" Plain

Thru Curbs at Radius Points.


Maintain Gutter Line

Toward Street to

Slope of Drive Must Be

Min.

15'

R

Curb

Required for Concrete Drives Only


R.O.W.

Concrete

6" Plain

See Note 5

for Max. Width

PRIVATE DRIVE WITH CURB

AND SIDEWALK

3. Subgrade under all curbs, sidewalks and drives shall be compacted in accordance with INDOTSS.

6. No handicap ramps permitted to fall in any portion of driveway.

1. Cross-hatched areas shall be 6" PCCP, Class A.

FIGURE 2501-015DATE


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2/12/16

INTERSECTION SIGHT DISTANCE

*

1. NO FENCE, WALL, HEDGE, TREE OR SHRUB PLANTING

WHICH OBSTRUCTS SIGHT LINES AND ELEVATIONS

BETWEEN THREE (3) AND NINE (9) FEET ABOVE THE

STREET SHALL BE PLACED OR PERMITTED TO REMAIN

ON ANY CORNER LOT WITHIN THE TRIANGULAR AREA

FORMED BY THE STREET RIGHT-OF-WAY LINES AND

A LINE CONNECTING POINTS 40 FEET FROM THE

INTERSECTION OF SAID STREET LINES. 40 FEET FOR

COLLECTORS AND LOCAL ROADS AND STREETS; AND

75 FEET FOR PRIMARY AND SECONDARY ARTERIALS,

OR IN CASE OF A ROUNDED PROPERTY CORNER, FROM

THE INTERSECTION OF THE STREET RIGHT-OF-WAY

LINES EXTENDED.

RIGHT OF WAY

E/P OR CURB

OF ROAD

CENTERLINE

SIGHT TRIANGLE

*

SIGHT TRIANGLE FOR LOCAL, COLLECTOR,

AND ARTERIAL ROADWAYS

NOTES:

ARTERIAL = 75 FEET

COLLECTOR = 40 FEET

LOCAL = 40 FEET*

2. FOR PRIVATE STREETS USE 25 FEET FROM EDGE OF

PAVEMENT ALONG PRIVATE STREET AND 40 FEET FROM

EDGE OF PAVEMENT ALONG PUBLIC STREET.

Convergence

Measured from R/W

MANUAL CHAPTER 46-10.0 SHALL BE SUBMITTED TO THE

3. FOR ANY VARIANCE FROM THIS STANDARD DRAWING,

EXHIBITS IN ACCORDANCE WITH THE INDIANA DESIGN

WESTFIELD ENGINEER FOR REVIEW AND APPROVAL.

FIGURE 2501-016DATE


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8"

8"

8"

2'-

3"

Timber Guardrail24' Buried End Timber Guardrail

6'-

0"

2'-

0"

1'-

10"

3'-

0"

TYPICAL SHOULDER AND GUARDRAIL DETAILS

Scale: 1/2" = 1'-0"

Scale: 1/2" = 1'-0"

TYPICAL RAILING ELEVATION

"

Shop

Bevel

21

Scale: 1/2" = 1'-0"

RAILPOST BEVEL DETAIL

Scale: 1/2" = 1'-0"

VEHICLE RAIL DRILLING DETAIL

4"4"

5"

"2

12

"2

12

5"

"2

12

"2

12

4" 2"2"

Scale: 1/2" = 1'-0"

VEHICLE RAIL @ SPLICE DRILLING DETAIL

Scale: 1/2" = 1'-0"Scale: 1/2" = 1'-0"

4" x 10" Vehicle Rail, SIS (Typ.)

4" x 10" x 8" Railpost Block, SIS (Typ.)

" Washer Ea., Field Drilled41Bolts With 1 - 3" x 3" x

" Dia. Head8-5Attach Approach Rail To Post With 2

8" x 8" Approach Railpost

" Washer Ea., Field Drilled41Bolts With 1 - 3" x 3" x

" Dia. Head8-5Attach Approach Rail To Post With 2

8" x 8" Approach Railpost

4" x 10" Approach Rail, SIS (Typ.)

SECTION A-A SECTION B-B

Compacted Aggregate No. 53

Hatched Area Indicates Limits of

10:1 Taper

Shoulder Break Line

Edge of Multi-Use Trail

Face of Timber Guardrail

SPECIFICATIONS:

TO BE DONE PRIOR TO TREATMENT.

10. ALL TIMBER TO BE CUT TO EXACT LENGTH, DRESSED TO SIZE REQUIRED, AND ALL PRACTICAL FRAMING

9. CONSTRUCTION REQUIREMENTS SHALL CONFORM TO STATE SPECIFICATIONS.

SPECIFICATIONS.

NOTED. ALL TO BE GALVANIZED AS PER CURRENT STATE SPECIFICATIONS AND/OR AASHTO MATERIAL

8. ALL HARDWARE TO MEET ASTM A307-97 AND ALL STRUCTURAL STEEL TO MEET ASTM A36, EXCEPT AS

7. ALL TIMBER CUT OR DRILLED IN FIELD SHALL BE TREATED WITH AN APPROVED PRESERVATIVE.

6. ALL TIMBER IS ROUGH UNLESS OTHERWISE NOTED.

5. BALANCE OF TIMBER TO BE DOUGLAS-FIR LARCH, IN ACCORDANCE WITH DESIGN REQUIREMENTS.

4. 4" X 10" & 4" X 4" RAILING TO BE DOUGLAS FIR-LARCH, NO. 1 SIS.

3. RAILPOSTS TO BE DOUGLAS FIR-LARCH, NO. 1, POST & TIMBER.

CONSTRUCTION.

2. ALL TIMBER TO BE GRADED AS PER NFPA 1991 NATIONAL DESIGN SPECIFICATIONS FOR WOOD

SPECIFICATIONS.

1. ALL TIMBER SHALL BE AWPA COPPER NAPHTHENATE TREATED AS PER CURRENT STATE AND/OR AASHTO

CONSTRUCTION NOTES:

6. SET THREADS ON ALL BOLTS AT NUT WITH A CENTER PUNCH AFTER TIGHTENING.

BETWEEN NUT & STEEL, OR BOLT HEAD & STEEL.

5. ANY NUT OR MACHINE BOLT HEAD IN DIRECT CONTACT WITH STEEL SHALL HAVE ONE CUT WASHER

WASHER BETWEEN NUT & TIMBER, OR BOLT HEAD & TIMBER.

4. ANY NUT OR MACHINE BOLT HEAD IN DIRECT CONTACT WITH THE TIMBER SHALL HAVE ONE PLATE

" FOR THE SHANK.1613THE BOLT AND

" IN DIAMETER FOR THE THREADED PORTION OF169" LAG BOLTS ARE TO BE 4

33. HOLES DRILLED FOR

" LARGER THAN BOLT SIZE.1612. HOLES DRILLED FOR BOLTS ARE TO BE

" SMALLER THAN SPIKE SIZE.1611. ALL HOLES DRILLED IN FIELD WHERE SPIKES ARE USED ARE TO BE

A

A

B

B

With No Railpost Block, Field Drilled

8" x 8" x 5'-0" Approach RailpostWith No Railpost Block, Field Drilled

8" x 8" x 4'-0" Approach Railpost

Rail, SIS

Approach Vehicle

4" x 10" x 12'-0"Rail, SIS, Field Drill

4" x 10" x 12'-0" Approach Vehicle

Rail, SIS, Field Drill

4" x 10" x 12'-0" Approach Vehicle

90 Spa. @ 6'-0" = 540'-0"12'-0" Buried Vehicle Rail6'-0" Buried Vehicle Rail5'-0" Buried Vehicle Rail1'-0"

2/10/17

TIMBER GUARDRAIL DETAILS

FIGURE 2501-017

CITY OF WESTFIELD

DATE

INDIANANo.

ANAIDNI

DERETSIGER

RE

ENI

GNE LANOISSE

FO

RP

STATE OF

GN

ILDNUS .A PILLIHP

11300022

standards of roadway geometric design ...westfield standards – 3/17 02501-1 section 02501 -...

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