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http://onlinepubs.trb.org...trr/1991/1303/1303-009.pdf

https://scholar.google.co...Jain&publication_year=1991

A two-lane road in rolling and hilly topography may not provide sufficient passing zone length between crests of vertical curves. The use of passing lanes can increase the passing opportunities, alleviating safety and operational problems on two-lane highways in a cost-effective manner. The simulation model TWOPAS was calibrated for different traffic and roadway conditions in Michigan. The calibrated model was used to study the operational benefits of providing passing lanes on two-lane highways. Two parameters, delay reduction and percentage vehicles in platoon, were selected for three configurations of road profiles. Simulation runs were made for different traffic volumes and truck percentages. The magnitude of the accident reduction potential of passing lanes was obtained. The total delay benefits were calculated by using a unit value of time established by AASHTO. The total benefit per year for different truck percentages and roadway conditions and the cost of construction for a passing lane were plotted against different average daily traffic values. The traffic volumes at which the benefits equal the costs of passing lanes for different traffic and roadway conditions were obtained.

This paper appears in Transportation Research Record No. 1303, Geometric Design Considerations 1991. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01407113

p. 83-91

1991

Transportation Research Record

030905110X

Figures (8) ; References (8) ; Tables (6)

Benefit cost analysis; Benefits; Passing lanes; Reduction (Chemistry); Safety; Simulation; Traffic delays; Traffic safety; Traffic volume; Two lane highways; Warrants (Traffic control devices)

Design; Highways; Safety and Human Factors; I20: Design and Planning of Transport Infrastructure

TRIS, TRB, ATRI

Nov 30 1991 12:00AM

• COMPARISON OF SAFETY EFFECTS OF ROADSIDE VERSUS ROAD IMPROVEMENTS ON TWO-LANE RURAL HIGHWAYS
• EFFECTS OF DESIGN CRITERIA ON LOCAL STREET SIGHT DISTANCE
• GAPS ACCEPTED AT STOP-CONTROLLED INTERSECTIONS
• LATERAL CLEARANCE TO VISION OBSTACLES ON HORIZONTAL CURVES
• SAFETY CONSIDERATIONS FOR TRUCK CLIMBING LANES ON RURAL HIGHWAYS
• SIDE FRICTION DEMAND VERSUS SIDE FRICTION ASSUMED FOR CURVE DESIGN ON TWO-LANE RURAL HIGHWAYS
• SIGHT DISTANCE MODEL FOR UNSYMMETRICAL CREST CURVES (WITH DISCUSSION AND CLOSURE)
• SIGHT DISTANCE MODELS FOR UNSYMMETRICAL SAG CURVES
• SOME TRAFFIC PARAMETERS FOR THE EVALUATION OF THE SINGLE-POINT DIAMOND INTERCHANGE
• SUPERELEVATION AND BODY ROLL EFFECTS ON OFFTRACKING OF LARGE TRUCKS
• TRAFFIC PERFORMANCE AND DESIGN OF PASSING LANES