Author(s):
C.J. Keese, C. Pinnell, W.R. McCasland
Publication Date
1959
Abstract
In 1956, TTI initiated a research project for the Texas Highway Department to correlate freeway operational characteristics with design features. A preliminary report of this study was presented to the 36th Annual Meeting of the Highway Research Board. The data presented herewith represents additional studies and analysis of this work.The study was made principally by the motion picture method which facilitated the simultaneous evaluation of various operational characteristics and provided the distinct advantage of being able to recreate traffic situations for more thorough study. Traffic operations were recorded on approximately 22,000 feet of 16 mm film during the course of nine separate studies made on freeways in Houston, Dallas, and Fort Worth, Texas. Research was conducted in the following areas: operation and capacity, freeway volume-control, lane use and placement, entrance ramps, and weaving. A study of freeway median design was also made and the results are being presented in a separate report.The results of these various studies indicate that the factors having the greatest effect on freeway operation are the design and operation of ramps and interchanges. Additional research and development is needed in this area. The volume-control, weaving, and entrance ramp studies produced some very significant results which are discussed in the report and will contribute to over-all knowledge of freeway operation.
Report Number:
Reprint No. 9
Link(s):
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