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Safety impacts of different speed limits on cars and trucks : final report

Author: David L Harkey; Ruben Mera; United States. Federal Highway Administration.
Publisher: McLean, Va. : Federal Highway Administration ; [Springfield, VA] : [Available through the National Technical Information Service], [1994]
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Database:WorldCat
Summary:
The objectives of this study were to determine whether differential or uniform speed limits are more beneficial to transportation safety and traffic operations on Interstate highways. The approach to achieving this objective was to examine speed and accident data from States employing both types of limits. Speed data were collected in 12 States at rural and urban locations representing all speed limits currently  Read more...
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Additional Physical Format: Online version:
Harkey, David L.
Safety impacts of different speed limits on cars and trucks.
McLean, Va. : Federal Highway Administration ; [Springfield, VA : Available through the National Technical Information Service, 1994]
(OCoLC)855523009
Material Type: Government publication, National government publication, Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: David L Harkey; Ruben Mera; United States. Federal Highway Administration.
OCLC Number: 30311476
Notes: Cover title.
"May 1994."
"Publication no. FHWA-RD-93-161."
Description: viii, 59 pages : illustrations ; 28 cm
Contents: Introduction --
Literature review --
Research methodology --
Data collection and reduction --
Speed data analysis --
Accident data analysis --
Summary and conclusions --
References.
Responsibility: [David L. Harkey and Ruben Mera].

Abstract:

The objectives of this study were to determine whether differential or uniform speed limits are more beneficial to transportation safety and traffic operations on Interstate highways. The approach to achieving this objective was to examine speed and accident data from States employing both types of limits. Speed data were collected in 12 States at rural and urban locations representing all speed limits currently established on the Interstate highway system for cars/trucks, i.e., 55/55 mi/h (89/89 km/h), 65/55 mi/h (105/89 km/h), 65/60 mi/h (105/97 km/h), and 65/65 mi/h (105/105 km/h). Accident data were obtained from nine States which were geographically distributed across the country and representative of all rural Interstate speed limits currently established. For the speed data collected, a number of measures of effectiveness (MOEs) were examined including mean speed, speed variance, compliance, and speed distribution measures. For the accident data collected, types of crashes were examined (e.g., rear-end) along with vehicle type involvement (e.g., car-into-truck) and crash severity. This final report summarizes the effects of uniform and differential speed limits on transportation safety and traffic operations as determined by the examination of speed and accident data.

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