Evaluation of the Impacts of Differential Speed Limits on Interstate Highways in Idaho

Dixon, Michael; Abdel-Rahim, Ahmed; Elbassuoni, Sherief

i

Evaluation of the Impacts of Differential Speed Limits on Interstate Highways in Idaho

2012-10-01
By Dixon, Michael ; Abdel-Rahim, Ahmed ; Elbassuoni, Sherief

File Language:

English

Details

Creators:

Dixon, Michael ; Abdel-Rahim, Ahmed ; Elbassuoni, Sherief
Corporate Creators:

University of Idaho. Dept. of Civil Engineering
Corporate Contributors:

Idaho. Transportation Department. Research Program ; United States. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA-ID-13-218
Resource Type:

Tech Report
Geographical Coverage:

Idaho
Edition:

Final or Interim Report; 4/13/12-10/31/12.
Corporate Publisher:

Idaho Transportation Department
Abstract:

In this research, an evaluation of the impacts of differential speed limits on rural interstate highways in Idaho was completed. The main purpose for this research was to determine if there have been any speed or safety effects after enacting the DSL, and also to study some of the geometric effects, like rumble-strips, on the safety of vehicles on rural Idaho interstates. Regarding the effects of DSL on speed, it was found that passenger car and truck speeds stabilized since the DSL policy implementation date. More specifically, the DSL reduced truck speeds, resulting in mean passenger vehicle and truck speeds of 74.7 and 65.6 mph, respectively. Regarding the DSL effect on speed compliance, Passenger vehicle compliance slightly worsened, while truck compliance improved. Establishment of the DSL policy also contributed to a decrease in the crash rates on Idaho’s rural interstates.
Format:

PDF
Funding:

RP 218l
Download URL:

https://rosap.ntl.bts.gov/view/dot/25335/dot_25335_DS1.pdf
File Type:

[PDF - 896.78 KB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:e21817cb2645c34ea9a0bec9060197bfa84211ffa735eb79eca87b4b1a39dc366d935165e10187b790aeb5e74bcd208d647d7750c034aaa745ceb2fd82a5a791

File Language:

English

ON THIS PAGE

Details

Found an issue?

Send us an email at:

publishinghd@cdc.gov

ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.