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advance air terminal air-cushion vehicles airplanes airports altitudes April ASPO automatic automobile expressways benefits buses California cargo cars centers city planning commercial competitive cost cost-benefit analysis Curtiss-Wright effects efficiency Electric elevators engineering equipment evaluation experimental facilities feasible federal FIGURE Flight International forms of transportation freeway future grade separation ground transportation ground-effect machines helicopter hydrofoil vessels illus Improved increased investment John Nolen land limitations Melville metropolitan area miles military mimeo mobile homes monorail municipal noise Officials 1313 East over-all overhead passenger planes Planning Officials 1313 portation possible private enterprise railroad reduced requirements research and development right-of-way sonic sonic boom space speculation concerning speed subsidy subsystems Supersonic Superspeed Aircraft surface take-off tank car technological tion Traffic Engineer transit TRANSPORTATION DEVELOPMENTS Transportation Systems urban scene urban transportation utility vehicle-cars vertical vertical-lift VTOL Wall Street Journal winged ground-effect York Times Section