burnside buscle bridge with towers in portland down town

american architecture balance barrier bascule bicycle bridge burnside bus central city commercial connect connection cycle cyclists down draw drawbridge drive driving elevating engineering hoist hoisting lift logistics movement moving northwest oregon outdoors paths pedestrian perspective portland powerful railing reliable river road roadside roadway run safety stainless steel straight structure style support symbol tension tower towers town traffic transport transportation transporting travel truss urban usa walking walkway way willamette