 A proposed bridge across the Northwest Arm to relieve traffic congestion on the Armdale Rotary (it would connect at South Street near Dalhousie University) was rejected several times by residents of the peninsula's affluent South End and by environmentalists advocating improved rapid transit and better planning to densify residential development close to locations of employment.In 2008 the Halifax Dartmouth Bridge Commission released a report on a possible third harbour crossing which considered both a six-lane bridge, costing $1.1 Billion, and a four-lane tunnel, costing $1.4 Billion, extending from the southern terminus of Highway 111 to the southern end of the peninsula near the Halifax Ocean Terminals.Because of the insular nature of the central business area, the concept of congestion tolling has been floated in the city from time to time.