NO PASSING ZONESNO PASSING ZONES

MnDOT 2008MnDOT 2008

Office of Traffic Safety and Office of Traffic Safety and OperationsOperations

WEB BASED WEB BASED DOCUMENTSDOCUMENTS

TEM CHAPTER 7 (136 changes for TEM CHAPTER 7 (136 changes for 2008)2008)

NPZ WORKBOOKNPZ WORKBOOK

MnMUTCDMnMUTCD

STANDARD PLAN SHEETS 5-STANDARD PLAN SHEETS 5-297.341 & .342297.341 & .342

Minn. Statute 169.18Minn. Statute 169.18 No passing if drivers view is obstructed No passing if drivers view is obstructed

for 700 feet when approaching a crest or for 700 feet when approaching a crest or curvecurve

No passing within 100 ft of underpass, No passing within 100 ft of underpass, tunnel, RR Xing, city intersection, or rural tunnel, RR Xing, city intersection, or rural intersection if marked with a warning intersection if marked with a warning sign.sign.

No passing where marked with a sign or a No passing where marked with a sign or a distinctive centerlinedistinctive centerline

MNMUTCDMNMUTCD

Centerline markings required at 6000+ Centerline markings required at 6000+ ADT and min. 20 foot width road or 3+ ADT and min. 20 foot width road or 3+ lanes. lanes.

IF CENTERLINES EXIST, NPZ’s MUST IF CENTERLINES EXIST, NPZ’s MUST BE INSTALLED AT :BE INSTALLED AT :

Lane reductions, RR xing, vertical and Lane reductions, RR xing, vertical and horizontal curves not meeting min. PSD, horizontal curves not meeting min. PSD, three lane sections, undivided 4 lanes, three lane sections, undivided 4 lanes, center turn lanes or painted medians. center turn lanes or painted medians.

MNMUTCDMNMUTCD

TYPICAL SPEED TYPICAL SPEED PROFILEPROFILE

8585THTH %TILE IS 64 mph ON STATE AID %TILE IS 64 mph ON STATE AID HIGHWAY DESIGNS ( 6 FT HIGHWAY DESIGNS ( 6 FT SHOULDER)SHOULDER)

WHAT IS 85WHAT IS 85THTH ON 4 FT SHOULDER ? ON 4 FT SHOULDER ? WHAT IS 85WHAT IS 85THTH ON 2 FT SHOULDER? ON 2 FT SHOULDER? WHAT IS 85WHAT IS 85THTH ON ZERO FT ON ZERO FT

SHOULDER?SHOULDER?

TEM CHART 7-3TEM CHART 7-3

Zone LengthZone Length

MINIMUM LENGTH OF NPZ IN MINIMUM LENGTH OF NPZ IN ADVANCE OF STOP SIGN Chart 7-2 ADVANCE OF STOP SIGN Chart 7-2 (SL OR 85(SL OR 85THTH))

0 – 35 MPH 300 FT ( 100 yards)0 – 35 MPH 300 FT ( 100 yards)40 – 50 MPH 400 FT ( 133 yards)40 – 50 MPH 400 FT ( 133 yards)55 + MPH 500 FT ( 167 yards) 55 + MPH 500 FT ( 167 yards)

RR Xing - MnMUTCD Table 2 C-4RR Xing - MnMUTCD Table 2 C-4 All other NPZ must be Min. 500 ft.All other NPZ must be Min. 500 ft. Other Lengths shown in TEM Chap. 7Other Lengths shown in TEM Chap. 7 Resurvey – sign should be within 100 ftResurvey – sign should be within 100 ft

Height of EyeHeight of Eye

Approx. 1 foot Approx. 1 foot square or larger square or larger targettarget

Reflectivity helps Reflectivity helps rangefinderrangefinder

Dual purpose as a Dual purpose as a target if telspar is target if telspar is usedused

4 inch LED from an 4 inch LED from an arrowboard for arrowboard for targettarget

WORK ZONE FIELD GUIDE WORK ZONE FIELD GUIDE

Mobile OperationMobile Operation Low ADT dayLow ADT day Layout 5Layout 5 Layout 2 with Adv. Layout 2 with Adv.

SignSign Geometry or no Geometry or no

shoulders will shoulders will require higher level require higher level WZ and coordination WZ and coordination with maintenance with maintenance area. area.

MARKINGSMARKINGS

YELLOW PAINTYELLOW PAINT

SAME WIDTH 4”SAME WIDTH 4”

TAPE WORKS TAPE WORKS WELL WELL ESPECIALLY FOR ESPECIALLY FOR GAP SELECTIONGAP SELECTION

SOLID LINESSOLID LINES

DO NOT PAINT thru public access DO NOT PAINT thru public access intersections – especially in rural areas.intersections – especially in rural areas.

50 foot accuracy window allows for 50 foot accuracy window allows for adjustment at public access adjustment at public access intersections. intersections.

DO paint thru private drives and DO paint thru private drives and business driveways. business driveways.

ITE 2001 TCD ITE 2001 TCD HANDBOOKHANDBOOK

Eyeball methodEyeball method Walking MethodWalking Method Towed target Towed target

methodmethod Two vehicle methodTwo vehicle method Computer Aid DMI Computer Aid DMI One vehicle methodOne vehicle method New Jersey coneNew Jersey cone

New Jersey coneNew Jersey cone Video-log methodVideo-log method Laser RangefinderLaser Rangefinder Optical RangefinderOptical Rangefinder Speed/Distance Speed/Distance

formulaformula New technology New technology

with vehicle with vehicle mounted lasers and mounted lasers and GPSGPS

EQUIPMENTEQUIPMENT 2 VEHICLES (ONE SEDAN)2 VEHICLES (ONE SEDAN) DMI IN EACH VEHICLEDMI IN EACH VEHICLE HEIGHT-OF-EYE PADDLESHEIGHT-OF-EYE PADDLES TARGET ON THE BACK OF LEAD VEH. TARGET ON THE BACK OF LEAD VEH.

MOUNTED ON THE LEFT REAR SIDEMOUNTED ON THE LEFT REAR SIDE HANDHELD TWO WAY RADIOSHANDHELD TWO WAY RADIOS RANGEFINDERRANGEFINDER SPRAY PAINT OR YELLOW TAPESPRAY PAINT OR YELLOW TAPE DISTANCE CHARTS AND FORMSDISTANCE CHARTS AND FORMS

CALIBRATE DMICALIBRATE DMI Check tire pressureCheck tire pressure Park cars side by sidePark cars side by side Zero out DMIZero out DMI Lead car moves forward to PSD for the Lead car moves forward to PSD for the

speed limit Chart 7-3speed limit Chart 7-3 Lead car Zeros-out again – now synchedLead car Zeros-out again – now synched Verify if DMI has reverse capabilityVerify if DMI has reverse capability Drive together using radio to call out Drive together using radio to call out

distancedistance

PROCESSPROCESS Vert. Curves can be done from shoulderVert. Curves can be done from shoulder Move slowly ahead until lead vehicle Move slowly ahead until lead vehicle

begins to get out of sight . begins to get out of sight . Radio – Stop both at synched DMI readingRadio – Stop both at synched DMI reading Advance in short intervals until target is Advance in short intervals until target is

gone. gone. Lead veh. Marks to the left of CL for the Lead veh. Marks to the left of CL for the

end of NPZ for opposing traffic end of NPZ for opposing traffic Trailing veh. Marks to the right for the Trailing veh. Marks to the right for the

beginning of NPZ for same direction traffic. beginning of NPZ for same direction traffic.

PROCESSPROCESS

PROCESS cont’dPROCESS cont’d

Vehicles again proceed forward until Vehicles again proceed forward until trailing veh. Sees roof of lead veh.trailing veh. Sees roof of lead veh.

Radio - Stop both at synched DMI readingRadio - Stop both at synched DMI reading Advance in short intervals until target is Advance in short intervals until target is

visiblevisible Lead veh. Marks to the left of CL for the Lead veh. Marks to the left of CL for the

beginning of NPZ for opposing trafficbeginning of NPZ for opposing traffic Trailing veh. Marks the right side for end Trailing veh. Marks the right side for end

of NPZ for same direction traffic.of NPZ for same direction traffic.

PROCESSPROCESS

HORIZONTAL CURVESHORIZONTAL CURVES

Centerline or left wheel path should Centerline or left wheel path should be used for target sight distance. be used for target sight distance.

This may require drivers to exit This may require drivers to exit vehicles and use height-of-eye vehicles and use height-of-eye paddlespaddles

Reverse curves may require driving Reverse curves may require driving both directionsboth directions

LOST VEHICLESLOST VEHICLES

Typically happens in multiple curve or hill Typically happens in multiple curve or hill geometrygeometry

Minimums PSD can be measured but Minimums PSD can be measured but view of vehicles are obstructed in the view of vehicles are obstructed in the middlemiddle

On low ADT roads - Lead vehicle may On low ADT roads - Lead vehicle may have to be used as oncoming traffic have to be used as oncoming traffic targettarget

Typically sighting of both headlights of Typically sighting of both headlights of oncoming traffic will sufficeoncoming traffic will suffice

LOST VEHICLESLOST VEHICLES

SPEED LIMIT CHANGESSPEED LIMIT CHANGES

PSD should be changed when speed PSD should be changed when speed limit changes limit changes

Re-set DMI Re-set DMI Speed limit change can happen in Speed limit change can happen in

the middle of a NPZ the middle of a NPZ Use the longer of two PSD if any Use the longer of two PSD if any

doubtdoubt Drive both directions. Drive both directions.

MINIMUM LENGTHSMINIMUM LENGTHS

500 FT MIN. - ADD TO THE BEGINNING500 FT MIN. - ADD TO THE BEGINNING CHART 7-2CHART 7-2 CHART 7-4CHART 7-4

RANGEFINDERSRANGEFINDERS

BUSHNELL 1500BUSHNELL 1500 1500 YARDS ON REFLECTIVE 1500 YARDS ON REFLECTIVE

TARGETTARGET 1000 YARDS ON POLE OR TREE1000 YARDS ON POLE OR TREE 500 YARDS ONA DEER OR BODY.500 YARDS ONA DEER OR BODY. + / - 1 YARD ACCURACY+ / - 1 YARD ACCURACY

CLOSING GAPSCLOSING GAPS

NPZ ZONE ENDS AT 1300 FT FROM NPZ ZONE ENDS AT 1300 FT FROM STOP SIGN – DO YOU STOP OR STOP SIGN – DO YOU STOP OR CONTINUE THE ZONE ?CONTINUE THE ZONE ?

Chart 7-2 and Chart 7-4Chart 7-2 and Chart 7-4 In a 55 MPH zone: Chart 7-2 = 500 In a 55 MPH zone: Chart 7-2 = 500

ft and Chart 7-4 equals 800 ft.ft and Chart 7-4 equals 800 ft. 167 yrds + 267 yrds = 434 yrds167 yrds + 267 yrds = 434 yrds YES – continue the zone – don’t end it. YES – continue the zone – don’t end it.

NPZ TOO SHORTNPZ TOO SHORT

NEW – 2 second EXEMPTIONNEW – 2 second EXEMPTION If the target vehicle is not completely If the target vehicle is not completely

out of sight for 2 seconds , the zone out of sight for 2 seconds , the zone can be ignored. can be ignored.

1MPH = 1.467 FEET/SEC.1MPH = 1.467 FEET/SEC. 30 MPH = 44 FT/SEC. X 2 = 88 FEET30 MPH = 44 FT/SEC. X 2 = 88 FEET 55 MPH = 81 FT/SEC. X 2 = 162 FEET55 MPH = 81 FT/SEC. X 2 = 162 FEET

ENVIRONMENTENVIRONMENT

CHECK EXEMPTION CHECK EXEMPTION ENVIRONMENTENVIRONMENT

Continuous curves Continuous curves Hidden driveways in the 2 sec. areaHidden driveways in the 2 sec. area Add distance to beginning of NPZ to Add distance to beginning of NPZ to

meet minimum 500 foot mimeet minimum 500 foot mi

CHECK EXEMPTION CHECK EXEMPTION ENVIRONMENTENVIRONMENT

RECOMMEND NPZ for the FULL RECOMMEND NPZ for the FULL LENGTHLENGTH

State of Minnesota Department of Transportation

NO PASSING ZONE STUDY Revised 03/03/08

HIGHWAY:          

COUNTY:     CONTROL SECTION:  

DATE:     OBSERVERS:    

   

DIRECTION OF TRAVEL

BEGIN NO PASSING ZONE

END NO PASSING ZONE

LENGTH OF NO

PASSING ZONE

POSTED SPEED

TYPE OF NO PASSING ZONE

(westbound, eastbound, northbound, southbound)

(Reference Point) (Reference Point) (Miles) (MPH)

(Vertical, Horizontal, Junction, RR Xing,

Passing Lane, Climbing Lane, Narrow Bridge,

Island, or Multi-lane Hwy Transition

      0    

      0    

      0    

      0    

      0    

      0    

      0    

REMOVAL OF SIGHT REMOVAL OF SIGHT OBSTRUCTION OBSTRUCTION

Request Maintenance Area to remove Request Maintenance Area to remove minor sight obstructions on the R/W.minor sight obstructions on the R/W.

Request needs to include location and Request needs to include location and nature of sight obstruction.nature of sight obstruction.

Request should be limited to the work Request should be limited to the work needed to avoid extending a no passing needed to avoid extending a no passing zone. zone.

SIGNINGSIGNING

48 X 60 Pennant W 14-348 X 60 Pennant W 14-3 OptionalOptional for STOP controlled for STOP controlled

intersections, simple RR xing, intersections, simple RR xing, roundabouts, and school crosswalksroundabouts, and school crosswalks

Required Required for sight obstruction, lane for sight obstruction, lane transitions, RR xing with stopping transitions, RR xing with stopping lane, narrow bridge and truck lane, narrow bridge and truck climbing laneclimbing lane

DO NOT PASSDO NOT PASS

OPTIONALOPTIONAL BACK-TO-TO-BACK-TO-TO-

BACK WITH STOP BACK WITH STOP SIGNS MUST BE SIGNS MUST BE ELIMINATED BY ELIMINATED BY 12/22/201312/22/2013

END ZONE - END ZONE - PASS PASS WITH CARE WITH CARE

NPZ TERMINAL NPZ TERMINAL MARKERMARKER

IF THERE ARE NO SHOULDERS OR IF THERE ARE NO SHOULDERS OR CHALENGING GEOMETRY, A CHALENGING GEOMETRY, A YELLOW POST ON THE YELLOW POST ON THE BACKSLOPE IS RECOMMENEDED.BACKSLOPE IS RECOMMENEDED.

STICKERS AVAILABLE FROM SIGN STICKERS AVAILABLE FROM SIGN SHOP. SHOP.

BREAKBREAK

QUESTIONS ????????QUESTIONS ????????

OTHER STATESOTHER STATES

AZ – Min Gap is 400 ft – no speed AZ – Min Gap is 400 ft – no speed differencedifference

NPZ length is always min. 500 ft. NPZ length is always min. 500 ft. Out of sight for 150 ft. – no speed Out of sight for 150 ft. – no speed

differencedifference Urban stop sign 100 ft - Rural 500 ft.Urban stop sign 100 ft - Rural 500 ft. 3.5 ft eye height to 4.25 ft. object 3.5 ft eye height to 4.25 ft. object

heightheight

IOWA - CTREIOWA - CTRE

3.5 FT TO 3.5 FT HEIGHT – BUT add 3.5 FT TO 3.5 FT HEIGHT – BUT add 100 feet to beginning of NPZ after survey100 feet to beginning of NPZ after survey

Min. length is based on speed –Only 200 Min. length is based on speed –Only 200 feet at 25 MPH and 500 feet at 55 MPH.feet at 25 MPH and 500 feet at 55 MPH.

Gap is always 400 feet – no speed Gap is always 400 feet – no speed differencedifference

Stop condition – 600 feet – connect Stop condition – 600 feet – connect zones at 300 ft gap.zones at 300 ft gap.

Only 300 ft in advance of narrow bridge.Only 300 ft in advance of narrow bridge.

FLORIDAFLORIDA

3.5 ft to 3.5 ft height3.5 ft to 3.5 ft height 500 FT Min. length, 400 foot gap500 FT Min. length, 400 foot gap Stop condition – based on speed out Stop condition – based on speed out

to 850 feet at 55 MPH conditionto 850 feet at 55 MPH condition Only 100 ft in advance of narrow Only 100 ft in advance of narrow

bridgebridge

WISCONSINWISCONSIN

3.5 FT to 3.5 FT Height3.5 FT to 3.5 FT Height Min length is 500 ft. Gaps are based Min length is 500 ft. Gaps are based

on speed from 528 ft at 40 MPH to on speed from 528 ft at 40 MPH to 792 ft at 55 MPH.792 ft at 55 MPH.

500 FT in advance of stop conditions500 FT in advance of stop conditions Variable PSD not based on MUTCDVariable PSD not based on MUTCD Survey Crew uses a THIS VEHICLE Survey Crew uses a THIS VEHICLE

MAKES FREQUENT STOPS warning MAKES FREQUENT STOPS warning sign on the car. sign on the car.