00769397

Component

https://doi.org/10.3141/1658-11

http://scholar.google.com...adou&publication_year=1999

The substantial costs that could be required to accommodate potential future trucks on the existing roadway system are estimated. These costs have been shown to be sensitive to the size of the truck and the extent of the roadway system considered. Geometric requirements are considered for truck configurations that have greater offtracking and swept-path width than tractor-semitrailer combinations with a single 14.6-m (48-ft) trailer (longer combination vehicles). The truck configurations evaluated include larger tractor-semitrailers, Rocky Mountain doubles, B-train doubles, turnpike doubles, and triples. The extent and cost of roadway widening that would be necessary to accommodate the larger trucks are considered for horizontal curves on mainline roadways and interchange ramps and for ramp terminals and at-grade intersections. Potential costs also are included to provide staging areas to accommodate larger multi-trailer trucks and the cost savings in geometric improvements that might be required if staging areas were provided. Tables illustrate both the estimated extent of geometric design improvements and the cost of those improvements to accommodate particular truck configurations on particular roadway networks. These costs have been estimated for truck configurations that are larger than the 14.6-m (48-ft) tractor-semitrailer combination that was used as the baseline vehicle for the study.

This paper appears in Transportation Research Record No. 1658, Highway Geometric Design and Operational Effects Issues.

English

p. 89-97

1999

Transportation Research Record

0309070554

Figures (1) ; References (1) ; Tables (5)

At grade intersections; Cost estimating; Costs; Geometric design; Highway design; Improvements; Interchange ramps; Offtracking; Pavement widening; Size; Tractor trailer combinations; Trucks; Turning radius

Horizontal curvature; Longer combination vehicles; Staging areas

Design; Finance; Highways; Motor Carriers; Planning and Forecasting; Vehicles and Equipment; I21: Planning of Transport Infrastructure; I90: Vehicles

TRIS, TRB, ATRI

Sep 8 1999 12:00AM

• A KNOWLEDGE-BASED GIS APPROACH TO THE EVALUATION OF DESIGN CONSISTENCY OF HORIZONTAL ALIGNMENTS
• DISTRIBUTION OF ROADWAY GEOMETRIC DESIGN FEATURES CRITICAL TO ACCOMMODATION OF LARGE TRUCKS
• EVALUATION OF ZERO-LENGTH VERTICAL CURVES
• LITTLE FALLS, GORHAM: RECONSTRUCTION TO A MODERN ROUNDABOUT
• LOCATION AND CONFIGURATION OF PASSING LANES
• OPERATING SPEEDS ON CURVES WITH AND WITHOUT SPIRAL TRANSITIONS
• RELATIONSHIP TO SAFETY OF GEOMETRIC DESIGN CONSISTENCY MEASURES FOR RURAL TWO-LANE HIGHWAYS
• RELATIONSHIPS BETWEEN BALL BANK INDICATOR READINGS, LATERAL ACCELERATION RATES, AND VEHICULAR BODY-ROLL RATES
• SCHOOL BUS DESIGN VEHICLE DIMENSIONS
• SPEED VARIABILITY ON RURAL TWO-LANE HIGHWAYS