2006 gis-t symposium columbus ohio · 2006 gis-t symposium columbus ohio ... ne ohio 12 snow plows...

2006 GIS2006 GIS--T SymposiumT SymposiumColumbus OhioColumbus Ohio

The Ohio Department of TransportationRoad Grip Tester Project

Diana Diana ClonchClonchOffice of Maintenance AdministrationOffice of Maintenance Administration

Snow and Ice CoordinatorSnow and Ice Coordinator

2006 GIST Symposium2006 GIST Symposium

ODOT Road Grip Tester

Snow Plow Unit

Tow Hitch Unit


Friction in Winter Maintenance

Commonly used in the evaluation of airport runways

Available systems were typically expensive and cost prohibitive for road maintenance

Successfully used in other countries for over 20 years within road maintenanceGained serious attention in the US during the early 90’s for use in winter road maintenance


Applications for Snow and Ice ControlProvides a method to quantify results

A measure of the quality of work performanceAn indicator of the consistency and uniformity of service

Assist with operational decision makingEarly detection of icy spots – treatment implementationEffectiveness/evaluation of treatment selections –treatment adjustments

Advisory information for motoristEarly warnings of icy conditionsAlerts for specific routes/geographical areas


Project Vision

Real time method to determine friction (grip) before, during and after a stormEarly detection of black ice and frostObjective method to evaluate performancePractical utilization and display with minimal interference to operatorsData transmittal for storage and analysisAdvanced notification for motorist alerts


Historical Overview

Summer 2001: ODOT contacted Halliday Technologies to investigate measuring road grip.

Increase snowplow operator safety. Improve public safety by helping snowplow operators detect icy conditions.

Spring 2002: ODOT began testing a prototype plow unit2003/2004 Four additional plow units installed2004/2005 Tow Unit Designed and 12 units deployed2005/2006 Equipped outpost fleet – 8 plow unitsCurrently 24 units – 12 tow and 12 snow plow


1st Roadway Grip Tester


Prototype Details

Mounted in the spring of 2002 on ODOT’sPrototype truck.

Truck contained a Force America CommandAll Hydraulic System and a ThomTech GPS System with data collection capabilities.

Prototype contained an in-cab display of 10 green, 10 amber and 10 red lights to indicate friction


The DisplayLights give the driver an indication of road surface conditions. More lights = more slippery conditions.Display is a voltmeter that reads the voltage from the hub, calibrated for road conditions.Numerical display (for unit calibration) is converted to a friction range


RGT Ranges

Green - Dry or wet Pavements

Yellow - Partly snow covered

Red - Snow covered or ice


RGT wheel is at 1.75°Angle

How RGT Works

RGT wheel is at a slight angle to the others.Wheel “scrubs” or is pushed sideways based on road grip conditions.This side force is converted to an electrical signal by the hub.


How RGT Works Contd…The Display

The Wire

Mobile Data Collector

With GPSThe Hub


Offset Tow Version


Snow Plow Unit


Initial Data Collection & Display

Data collected and stored to a card reader

Downloaded to a database and/or spread sheet and graphed

Mapped using ArcView

Photos and graphics added manually


Results - Winter 2002-2003During a light morning snow, different traffic volumes were seen to affect the surface friction.


Black Ice

During the early morning, rain with fallingtemperatures formed a 1/8” to 1/4” ice sheet


Consistency and Repeatability

Truck 524 - 15 Passes (11/22/04)*began raining SB pass 7

275

300

325

350

Pass 1

Pass 2

Pass 3

Pass 4

Pass 5

Pass 6

*Pas

s 7Pass

8Pass

9Pass

10Pass

11Pass

12Pass

13Pass

14Pass

15

OD

OT

Fric

tion

Uni

ts

524 NB

524 SB

*


Follow Testing – Wet and Dry

Unit 0524 v. Unit 0549Southbound11/19/2004

200

250

300

350

400

1 2 3 4 5

# of Passes

Avg.

Fric

tiona

l V

alue

s

Unit 0524 WetUnit 0549 WetUnit 0524 DryUnit 0549 Dry


Comparative Readings

RGT Follow Test 2/3/05, Waverly to Columbus

050100150200250300350400450500

5:33

:35

AM5:

27:4

5 AM

5:24

:15

AM5:

20:4

5 AM

5:17

:15

AM5:

13:4

5 AM

5:09

:05

AM5:

05:3

5 AM

5:02

:05

AM4:

58:3

5 AM

4:55

:05

AM4:

51:3

5 AM

4:48

:05

AM4:

44:3

5 AM

4:41

:02

AM4:

37:3

1 AM

4:34

:01

AM4:

30:3

7 AM

4:27

:01

AM

T ime

050

100150200250300350400450

Unit 560, Ave = 286 Unit 543, Ave = 270*


Green Range

Date:1-22-2005

Time:10:04 AM

Friction Reading:246

Air Temp:30

Pavement Temp:30

RGT Scale:Green


Yellow Range

Date:1-23-2004

Time:9:35 AM

Friction Reading:162

Air Temp:8

Pavement Temp:8

RGT Scale:Yellow


Red Range

Date:1-22-2005

Time:7:57 AM

Friction Reading:49

Air Temp:28

Pavement Temp:28

RGT Scale:Red


US 33 on 12/22/04Transition Rain to Snow

12/22/2004 - US 33*Pictures are associated w/ colored points

0

100

200

300

400

500

8:02:05 8:03:55 8:05:45 8:07:35 8:09:25 8:11:15 8:13:05 8:14:55 8:16:45 8:18:35 8:20:25 8:22:15 8:24:05 8:25:31 8:27:21 8:29:11 8:31:01 8:32:51 8:34:41 8:35:59 8:37:49 8:39:39 8:40:57 8:42:23 8:44:13 8:45:15 8:46:33 8:47:35 8:48:45 8:49:31

Fric

tiona

l Val

ues

Franklin-Union County Line

1

2

37

4

8

9

5

6

Union-Logan County Line


US-33 WB on 12/22/048:00 - 9:00 AM


Photo 1


Photo 2


Photo 3


Photo 4


Photo 5


Photo 6


Photo 7


Photo 8


Photo 9


Data Collection Upgrades

Began real-time data collection late January 2005

Data collected for each individual unit and reported real-time to a web site Graphic and tabular display in real-time and playback modes


Web Site Screen


Columbus, Ohio3/1/05 4-5 PM


Columbus, Ohio3/1/05 5-6 PM


Deployment Winter 05/0624 Units

12 Real Time Data Tow Units Three First Team units – Columbus Three Road Crewzers units - ClevelandTwo Maint Admin units – Central OfficeTwo District 7 units – Dayton One District 6 unit – Pickaway CountyOne District 4 unit – NE Ohio

12 Snow Plows Deployed8 District 6 real time units4 District 6 manual units


Anticipated Outcome

Create a system that detects, records, reports and disseminates informational data regarding low grip areas on road surfaces

Explore integration with other AVL applications and RWIS

To provide a process for integration of this data into an early alert and advanced notification system for:

Winter Maintenance ActivitiesMotorist AlertsOhio Transportation Information System, OTISTreatment ImplementationTreatment Adjustments Performance Evaluations


Most Recent Event

First Day of SpringMarch 21, 2006

Grove City Outpost – Plow Units


Grove City 3/21/06 08:15 AM – 08:45 AM


Grove City 3/21/06 08:30 AM – 09:00 AM


Grove City 3/21/06 08:45 AM – 09:15 AM


Grove City 3/21/06 09:00 AM – 09:30 AM


Grove City 3/21/06 09:15 AM – 09:45 AM


Grove City 3/21/06 09:30 AM – 10:00 AM


Grove City 3/21/06 09:45 AM – 10:15 AM


Grove City 3/21/06 10:00 AM – 10:30 AM


Grove City 3/21/06 10:15 AM – 10:45 AM


Grove City 3/21/06 10:30 AM – 11:00 AM


Questions - Discussion

???????????

Diana Clonch(614) 644-7159

[email protected]

2006 gis-t symposium columbus ohio · 2006 gis-t symposium columbus ohio ... ne ohio 12 snow plows...

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