TRUCK SPEEDS ON GRADES

Truck acceleration and deceleration curves are presented for use in obtaining speeds at specific points on a grade and for estimating travel time for use in economic comparisons. These curves are for upgrades only and cover accelerating, decelerating, and crawl conditions. A sample calculation is included which uses these curves to calculate truck travel time and operating costs over a hypothetical grade. It is noted that the correct procedure is to average the reciprocal of the speeds (hours per mile) and multiply by the intervening distance (miles) to obtain the time. This type of analysis should only be used on projects where grades are an important factor such as in mountainous terrain.

• Corporate Authors:

  California Department of Transportation

  5900 Folsom Boulevard
  Sacramento, CA  United States  95819
• Publication Date: 1961-9

Media Info

• Features: Figures; Tables;
• Pagination: 4 p.

Subject/Index Terms

• TRT Terms: Calculation; Deceleration; Highway curves; Mechanical acceleration; Mountains; Slopes; Speed; Travel time; Trucks; Vehicle performance
• Uncontrolled Terms: Computation; Grades
• Old TRIS Terms: Truck performance
• Subject Areas: Highways; Motor Carriers; Safety and Human Factors;

Filing Info

• Accession Number: 00152997
• Record Type: Publication
• Report/Paper Numbers: Traffic Bull. No. 2
• Files: TRIS, STATEDOT
• Created Date: May 31 1977 12:00AM