Cover: Response of Emergency Units

Response of Emergency Units

The Effects of Barriers, Discrete Streets, and One-Way Streets

Published 1971

by Richard C. Larson

Download eBook for Free

FormatFile SizeNotes
PDF file 0.9 MB

Use Adobe Acrobat Reader version 10 or higher for the best experience.

In realistic urban environments, emergency response vehicles may encounter one-way streets and barriers such as rivers that impede rapid response. Formulas are developed for the associated increase in mean travel distance, using a model in which both the demands for service and the locations of the vehicle are uniformly distributed over the response area. Barriers of even moderate size are found to increase average travel distance less than 10 percent, and a system of one-way streets increases the average distance by two block lengths. However, in 6.2 percent of responses on a one-way street grid, the vehicle has to travel an extra six block lengths.

This report is part of the RAND report series. The report was a product of RAND from 1948 to 1993 that represented the principal publication documenting and transmitting RAND's major research findings and final research.

This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit

RAND is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.