Recent Geometric Design Research for Improved Safety and Operations

Recent Geometric Design Research for Improved Safety and Operations
Author: Kay Fitzpatrick
Publisher:
Total Pages: 144
Release: 2001
Genre: Technology & Engineering
ISBN:

TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 299: Recent Geometric Design Research for Improved Safety and Operations reviews and summarizes selected geometric design research published during the 1990s, particularly research with improved safety and operations implication.

Attitudes Concerning Two-way and One-way Frontage Roads

Attitudes Concerning Two-way and One-way Frontage Roads
Author: Vergil G. Stover
Publisher:
Total Pages: 126
Release: 1988
Genre: Frontage roads
ISBN:

This report presents the results of an attitude survey concerning one-way and two-way freeway frontage roads. This research was part of a two-year study for developing warrants for conversion from two-way to one-way frontage roads. Interviews were conducted with 121 individuals in 15 different small and medium-sized cities in Texas. All of the 15 cities have freeways with two-way or one-way frontage roads. The results of the attitude survey showed that the increased safety associated with one-way frontage roads is universally recognized by all interest groups. Operational considerations, such as capacity, are much less understood.

Freeway Operations

Freeway Operations
Author: National Research Council (U.S.). Transportation Research Board. Committee on Freeway Operations
Publisher:
Total Pages: 28
Release: 1961
Genre: Express highways
ISBN:

NCHRP Report

NCHRP Report
Author:
Publisher:
Total Pages: 135
Release: 1964
Genre: Highway capacity
ISBN: 9780309060677

Development of Level-of-service Analysis Procedure for Frontage Roads

Development of Level-of-service Analysis Procedure for Frontage Roads
Author: Kay Fitzpatrick
Publisher:
Total Pages: 266
Release: 1996
Genre: Frontage roads
ISBN:

The objective of the research was to develop a procedure for evaluating the operations along one-way and twoway freeway frontage roads. The developed procedure is based on the arterial analysis chapter of the Highway Capacity Manual and includes consideration of the delays that are incurred at ramp junctions. To develop the level-of-service analysis procedure, data were collected at several locations within Texas. Travel time, volume, and access density data were collected at 20 one-way frontage road sites and nine two-way frontage road sites. Delay data were collected at six ramp junctions. The results showed that signalized intersections have the greatest impact on the operations along a frontage road. Access density (i.e., the number of driveways and unsignalized intersections per km) affects the operations along a frontage road segment when greater than 20 acs/km on one-way frontage roads and greater than 16 acs/km on two-way frontage roads. The developed procedure produced reasonable results when compared to the average speed measured at six one-way and six two-way frontage road sites. Predicted results were generally within 3 km/in of measured speeds.