Decades ago, the Pacific Northwest city launched a multibillion-dollar transit building boom. Now the new lines and stations are drawing riders — and criticism.

The new East Link segment of King County’s light rail system crosses Lake Washington on a first-of-its-kind floating bridge.

Sound Transit light rail stations in Seattle shut down twice due to ventilation system issues. Passengers were rerouted to buses between University District and Westlake stations. An investigation ...