URBAN UNDERGROUND HIGHWAYS AND PARKING FACILITIES,
RAND CORP SANTA MONICA CALIF
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The cost of constructing and operating selected conventional urban highways and their right-of-way cost are plotted over a half-century span. Similarly, the costs of some automobile vehicular tunnels built in this century are also presented for comparison. The operating costs of highways and tunnels are also listed and compared, and those for underground roads are shown to be lower already than those for equal-capacity surface roads. Having deduced from a simple cost comparison that underground urban automotive traffic might not involve much greater costs than surface traffic in the future, and design of future urban highways and parking is investigated, and secondary features and advantages of such systems are enumerated. The conclusions, suggestions, and implications of the study are then discussed.