Citation

Mcclintock M, Davis GW, Thompson JT. Highw. Res. Board Proc. 1938; 1938.

Copyright

(Copyright © 1938, National Research Council (U.S.A.), Highway Research Board)

DOI

unavailable

PMID

unavailable

Abstract

With a growing recognition of the need for medial and marginal protection of traffic lanes, there has arisen the collateral problem of the proper design of such protection. The bureau for street traffic research at YAle University has attempted a contribution toward this problem of design through the creation of two types of mechanical deflectors. These designs have been aimed at several specific objectives: (1) a device that will occupy a minimum of roadway width, (2) a device that will restrain and redirect the course of motor vehicles within the normal range of attacks without injury to the vehicle or its occupants, (3) a device that does not create related or secondary hazards, and (4) a device that can be installed economically. The first of these has been designated as a "channelled traffic deflector plate". This is designed to redirect the course of vehicles impinging upon it, but under conditions which do not preclude a safe crossing of the deflector at the will of the operator. The second has been designed as a "parabolic traffic deflector". This is designed to accomplish the objectives set forth above, but under circumstances where it is impossible for the driver to cross the deflector. It is therefore applicable under those conditions where traffic operations require the prohibition of passing beyond the area where the device is installed.