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

Janson, Bruce N.; University of Colorado at Denver

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

1999-12-15
By Janson, Bruce N.

[PDF-333.42 KB]

English

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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 Crash Reduction Driver Performance Monitoring Evaluation And Assessment Operational Tests Sensors & Detectors Traffic Speed Measurement Truck Drivers Trucking Safety Truck Traffic Variable Message Signs Warning Systems
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
Collection(s):

ITSJPO Digital Library
Main Document Checksum:

[+]

urn:sha256:a48f855b081b80145c6609ed05ecb3ccea547e2de6bb41dcadf3b2dcc2b0facb
Download URL:

https://rosap.ntl.bts.gov/view/dot/2886/dot_2886_DS1.pdf
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Evaluation of downhill truck speed warning system on I-70 west of Eisenhower Tunnel

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