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additional cost amount annual cost assumed automobiles average cost bp)x capital value car mile car minute carry cent per annum cent per vehicle cents per car CM CM congestion cost of construction cost of maintenance cost of operation cost of right-of-way cost of vehicle delays density of traffic determined economically warranted engineering estimate of cost estimated cost example expenditures follows grade crossing highway project improvement increase items of cost Jersey City Jersey State Highway kinetic energy lift bridges Lincoln Highway Lincoln Highway bridge linear foot machinery materially maximum density miles per hour normal rate number of vehicles operating cost overpass passenger cars period rate of speed rise and fall road roadway surface route samix saving Scheme shown in Table Steel structure street superelevation traffic circle traffic interruption uado unit prices various vehicle mile vehicle minutes vehicles passing vehicles per minute vehicles stopped volume of traffic