Colorado
Department of Highways
Division of Transportation Planning
Tom Talmadge, Project Coordinator
Bob Tenney, Technical Coordinator
Denver, CO
July 1983
The National Weigh-In-Motion Conference was attended by representatives from all 50 states and many foreign countries. The papers contained within this publication are a compilation of those presented at the Conference. Following is a list of those papers. Abstracts are included where available.
OPENING SESSION
Welcome
Dwight Bower, Colorado Department of Highways
Welcome
M. C. Reinhardt, FHWA Region 8, Denver, CO
Overview
of Truck Weight Data Needs
Kevin Heanue, FHWA, Washington, D.C.
Why Size
& Weight Enforcement
Harry Skinner, FHWA, Washington, D.C.
Overview of State Programs:
Truck Weight
Studies
Jerry Legg, West Virginia Department of Highways, Charleston, WV
Size &
Weight Enforcement
Allan Childers. Georgia Department of Transportation, Atlanta, GA
Combined
Size & Weight Enforcement
Spence Garret and Adam Uhrich, Wyoming Highway Department, Cheyenne, WY
Guest Dinner
Speaker
Robin Moore, TRRL, Ministry of Transport, U.K.
COLLECTION AND USE OF TRUCK CHARACTERISTICS DATA
Truck
Weight Data (Federal & State Programs for Collection and Use of Truck
Weight Data)
Perry Kent, FHWA, Washington, D.C.
George Novenski, Wisconsin Department of Transportation, Madison, WI
Stephen Fregger, Florida Department of Transportation, Tallahassee, FL
Size
and Weight Enforcement (Federal & State Programs for Enforcement of
Size and Weight Regulations)
Harold J. Brown, FHWA, Washington, D.C.
John Balcom, Washington Highway Patrol
J. R. Doughty, Pennsylvania Department of Transportation, Harrisburg,
PA
Lunch Guest
Speaker: United Kingdom System of Truck Weight Enforcement by Low-Speed
in Motion Weighing
Jack Winder, Department of Transport, U.K.
Handbook
44
Otto Warnloff, National Bureau of Standards, Gathersburg, MD
WIM TECHNOLOGY
Concepts, Advantages, & Applications of WIM Systems
Dr. Clyde Lee, University of Texas, Austin, TX
Experiences with WIM Systems
Minnesota
(IRD): William Ebert, Minnesota Department of Transportation, St. Paul,
MN
Idaho (PAT): John Hamrick, Idaho Department of Transportation, Boise,
ID
Nevada (Radian): Donald Pray, Nevada Department of Transportation, Carson
City, NV
Georgia (Streeter Amet): Kenneth Copeland, Georgia Department of Transportation,
Columbus, OH
Maine (Bridge WIM): John Wyman, Maine Department of Transportation, Augusta,
ME
Arizona (Golden River): Louis Schmitt, Arizona Department of Transportation,
Phoenix, AZ
This paper presents the results of an experimental strain gauge instrumentation of a simple single span bridge in Skowhegan, Maine, and tests conducted to calibrate the bridge as a vehicle scale.
Sample data obtained are presented and future plans for automatic data recording are outlined. A brief review of the system costs are provided.
DESIGN AND OPERATION OF WIM EQUIPMENT
Design
and Operation of WIM Sites
Ed Rugenstein, FHWA, Washington, D.C.
Larry Symones, Kansas Department of Revenue, Topeka, KS
RTAP DEMONSTRATION
RTAP Demonstrations
of Coordinated Program for Truck Weight Studies and Size and Weight Enforcement
Texas: Otto Wehring, State Department of Highways and Public Transportation,
Austin, TX
Arizona: Edward Green, Arizona Department of Transportation, Phoenix,
AZ
Wisconsin: William Gardner, Division of Planning and Budget, Madison,
WI
SUMMARY OF CONFERENCE
Future
Advances in WIM Technology
Dr. Arthur T. Bergan, University of Saskatchewan, Saskatoon, Canada
WORKSHOP
A - RECOMMENDATIONS FOR IMPROVING THE FHWA TRUCK WEIGHT STUDY
Iowa: Patrick Cain, Iowa Department of Transportation, Ames, IA
Alaska: Karen Morehouse, Alaska Department of Transportation, Juneau,
AK
Arkansas: Paul Simms, Arkansas State Highway & Transportation Department,
Little Rock, AR
WORKSHOP
B - USE OF WIM EQUIPMENT IN AN EFFECTIVE SIZE & WEIGHT ENFORCEMENT
PROGRAM
Pennsylvania: J. R. Doughty, Pennsylvania Department of Transportation,
Harrisburg, PA
Alabama: Paul Bowlin, Alabama Highway Department, Montgomery, AL
Illinois: Larry Shoudel, Illinois Department of Transportation, Springfield,
IL
WORKSHOP
C - COORDINATED WEIGHT MONITORING & ENFORCEMENT PROGRAM USING WIM
EQUIPMENT
Nevada: Donald Pray, Nevada Department of Transportation, Carson City,
NV
Oregon: Loyd Henion, Oregon Department of Transportation, Salem, OR
Caltrans: Wallace Ames, California Department of Transportation, Sacramento,
CA and Chief E. E. Kynaston, California Highway Patrol, Sacramento, CA
The California Department of Transportation (Caltrans) first became actively involved in Weigh-in-Motion (WIM) research nearly 15 years ago. We had studied the concept in the early 1950's but didn't get into the hardware stage. Our initial research study was to investigate the feasibility of screening heavy vehicles for potential truck weight law violations and thereby to improve efficiency of high traffic volume weigh stations on freeways. Since that time, the aging of our freeway facilities and accompanying deterioration of pavement and bridge structures has fostered a growing need to more objectively assess the impact of heavy vehicles on pavement and bridge deck deterioration. More specifically, we need to better relate accumulative 18-kip equivalent single axle loads (ESAL) to the rate of pavement deterioration. Continuing Caltrans WIM research evaluated two state-of-the-art systems for their potential use in enforcement screening and for truck weight monitoring.
The biennial truck weight study and other classification and census information gathering efforts provide a reasonably good system-wide picture. these efforts do not, however, provide statistically valid samples of heavy vehicle information needed to better assess the performance of given pavement designs or rehabilitation strategies. The truck weight study and other census and classification data provide only limited information on movement of commodities for use in systems planning.
Caltrans has developed a Master Plan for implementation of Weigh-In-Motion which emphasizes the coordination of weight monitoring and enforcement. The tentative plan is to implement the installation of WIM equipment at 28 selected sites statewide. The general objectives of this plan include improving the effectiveness of weight enforcement, improving the quantity and statistical quality of truck size and weight information for pavement and bridge design and performance evaluation, and providing a better data base for estimated volume projections of heavy vehicles and corresponding goods movement trends and seasonal patterns for systems planning purposes.
The future direction of this plan is contingent on the performance of Phase I installations, which include an on-going contract to install WIM equipment in truck lanes of a freeway for pavement performance monitoring and an early contract to install WIM in an existing weigh station for truck weight enforcement screening purposes. Subsequent contracts are planned to implement the Master Plan over the next several years.
With growing public agency and industry interest in WIM and rapidly changing state-of-the-art, it is likely that we will see a widening usage of WIM and significant changes in California's WIM Master Plan.
WORKSHOP
D - USES OF WIM EQUIPMENT FOR BRIDGE LOAD HISTORIES, PAVEMENT LOADING
DATA, ETC.
Washington: Kris Gupta, Washington Department of Transportation, Olympia,
WA
Florida: William Lofroos, Florida Department of Transportation, Tallahassee,
FL
Kentucky: R. A. Walsburger, Kentucky Transportation Cabinet, Frankfort,
KY
Louisiana: Steve Bokun, Louisiana Department of Transportation, Baton
Rouge, LA
FIELD TRIP
INFLUENCE
OF TRUCK SIZE AND WEIGHT ON HIGHWAY CRASHES
Ian Jones, Howard Stein, and Paul Zador, Insurance Institute for Highway
Safety, Washington, D.C.
Last Modified: November 2007
Maintained by: traffic@nmsu.edu
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