aerial view of the interchange of sam houston tollway state route 8 and interstate 45 in harris county texas

intercontinental infrastructure interchange interstate metropolis transport racetrack overpass houston tollway airport highway freeway stadium traffic aerial harris county george bridge state route texas view bush road lane sam usa iah houston tollway texas interchange 45 county overpass multiple highway construction traffic iah aircraft point view office building car truck emergency route environmental issues pollution urban cityscape aerial skyline downtown bridge buildings transportation cloverleaf urban sprawl real estate commercial business park parking lot entrance ramp concrete spaghetti east greater area district development infill infrastructure elevated crossroad I-45