Evaluation of downhill truck speed warning system on I-70 west of Eisenhower Tunnel

Details

• Alternative Title:
  Evaluation of downhill truck speed warning system on Interstate 70 west of Eisenhower Tunnel
• Creators:
  Janson, Bruce N.
• Corporate Creators:
  University of Colorado at Denver
• Corporate Contributors:
  Colorado. Office of Transportation Development
• Subject/TRT Terms:
  • Commercial vehicle operations
  • Traffic speed measurement
  • Variable message signs
  • Warning systems
  • Truck traffic
  • Truck drivers
  • Trucking safety
  • Evaluation and assessment
  • operational tests
  • crash reduction
  More +
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Edition:
  Final report
• Corporate Publisher:
  Colorado. Dept. of Transportation. Office of Transportation Development
• Abstract:
  The purpose of this study is to evaluate the effectiveness of the downhill truck speed warning system (DTSWS) installed in the westbound lanes of Eisenhower Tunnel on I-70 in Colorado. The DTSWS uses weigh-in-motion technology and a message display sign. A long downgrade of at least 10 miles with -5% to -7% grades follows the tunnel. From 1990-1998 there were 125 truck-related accidents on this 10-mile downgrade. The primary measures of effectiveness investigated by this study are driver awareness and driver compliance. Results of the study suggest that the speed warning system appears to significantly reduce truck descent speeds for almost all weight ranges above the 40,000 pound minimum to which the warning system responds.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/2886/dot_2886_DS1.pdf
• File Type:
  [PDF - 333.42 KB]
• Collection(s):
  ITSJPO Digital Library
• Main Document Checksum:
  urn:sha256:a48f855b081b80145c6609ed05ecb3ccea547e2de6bb41dcadf3b2dcc2b0facb