Lions Gate Bridge closures to replace one section at a time. The old section would be lowered to a barge, and the new one raised into place and connected. The change allowed the two pedestrian walkways to be moved to the outside of the structure and the road lanes were accordingly widened from 3 to 3.6 m (from 10 to 12 ft) each. Lions Gate Bridge The Lions Gate Bridge, opened in 1938, officially known as the First Narrows Bridge, is a suspension bridge that crosses the first narrows of Burrard Inlet and connects the City of Vancouver, British Columbia, to the North
Golden Gate Bridge to build the Golden Gate Bridge. The highway carried about 91,000 vehicles each weekday between downtown San Francisco and the North Bay and points north. The road was deemed "vulnerable to earthquake damage", had a problematic 4-lane design, and lacked shoulders, and a San Francisco County Transportation Authority study recommended that it be replaced. Construction on the $1 billion replacement, temporarily known as the Presidio Parkway, began in December 2009. The elevated Doyle Drive was demolished on the weekend of April 27–30, 2012, and traffic used a part of the partially completed Presidio Parkway, until it was switched onto the