When the Olneyville Bypass opened in 1953, US 6 was rerouted to use it. Eastbound US 6 simply exited the bypass onto Westminster Street to rejoin its old route, but westbound US 6 used a totally different route. It turned northwest on Main Street instead of crossing the Point Street Bridge, and turned west at Waterman Street to reach Promenade Street, then passing through the large rotary north of Union Station onto Kinsley Avenue. (Kinsley Avenue was later one-way eastbound in that area, so US 6 west continued on Promenade Street from the rotary, crossing to Kinsley Avenue somewhere to the west.