Design Vehicles for Arterials, Expressways, Freeways and Highways - Geometric Design Standards

Oct 23, 2026

Uploaded by Theodore

This technical document provides standardized geometric design specifications for heavy transport vehicles, specifically focusing on WB-20 semi-trailer and WB-36 double trailer configurations. It outlines critical physical dimensions including vehicle length, width, axle counts, and overhang measurements for road infrastructure planning. Additionally, the document details operational parameters such as steering lock angles, articulating angles, and minimum turning radii based on data from the City of Saskatoon Infrastructure Services Department and Alberta Infrastructure highway standards. These specifications are essential for civil engineers and urban planners involved in designing arterial roads, expressways, and freeways to ensure adequate traffic accommodation and safety. The technical data provided ensures that roadway geometry is compatible with the physical capabilities and turning requirements of large commercial transport vehicles.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages1

Reading Time3 min

AccessFree to download

Technical Specifications for Transport Vehicles

WB-20 Semi-Trailer Dimensions

WB-36 Double Trailer Dimensions

Vehicle Operational Parameters and Geometric Standards

FAQs

What are the primary differences in length between the WB-20 and WB-36 vehicle models?

The WB-20 semi-trailer has an overall vehicle length of 22.7 meters, whereas the WB-36 double trailer is significantly longer at 38.0 meters.

What is the minimum turning radius for the WB-36 double trailer?

The minimum turning radius for the WB-36 double trailer is 17.34 meters when measured at a 90-degree angle based on the centerline.

What regulatory or reference bodies provided the data for these vehicle specifications?

The specifications are based on data from the TAC 1999 library for the WB-20 and Alberta Infrastructure Highway Geometric standards for the WB-36.

Oct 23, 2026

Uploaded by Theodore