Stop-and-go traffic between Marin County and San Francisco across the Golden Gate Bridge was also recorded, as was heavy northbound congestion on the peninsula’s Bayshore Freeway along Highway 101. Meanwhile, the most severe congestion thus far identified by the “test lines” in 1954 was, of course, found on the routes between Oakland and San Francisco on the Bay Bridge.

However, it was estimated that for every parking space at a suburban station there would be ten or more passengers competing for it. In the outlying areas, private automobiles would more than likely be driven to stations where parking would be made available. Both of these local systems, as well as other local systems, would play an important role as feeder or connecting lines for local destinations. “The success of a rapid transit system will greatly depend on establishing relationships with already established carriers such as AC Transit, a regional bus system which had taken over the Key System routes, and San Francisco Muni,” the planners said. In fact, PBHM planners regarded the coordination of existing surface transit, both local and interurban, with a new system as a critical component of the overall plan. Good land-use planning by incorporated cities and counties would have to be integrated with transportation planning in anticipation of future growth.

The results showed that capacity on corridors serving the outlying areas in the north, south, and east had not yet been exceeded, but these were not as yet high-density areas. Another goal of this methodology was to determine the capacity of existing high- ways during peak periods. These test lines, as they were referred to, were strategically located throughout the nine counties that make up the Bay Area. Text originally published in BART: The Dramatic History of the Bay Area Rapid Transit System Heyday Books: Berkeley CA, 2016ĭuring the course of their work, Parsons, Brinckerhoff, Hall & MacDonald (PBHM) engineers in 1954 carefully identified twenty-three specific areas that they considered bottleneck areas, or potential bottlenecks, to measure on heavily used corridors.

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