From Marshy Hope, Trunk 4 proceeds east to Antigonish. In Antigonish, it follows Post Road, James Street, Main Street, and St Andrews Street. East of Antigonish it proceeds to South River Station. Heatherton to Auld's Cove Trunk 4 is discontinuous between South River Station and Heatherton as Highway 104 mostly uses the old Trunk 4 alignment. From Heatherton, Trunk 4 proceeds east to Auld's Cove. Port Hastings to Glace Bay Trunk 4 is discontinuous between Auld's Cove and Port Hastings as Highway 104 uses the old Trunk 4 alignment. From Port Hastings, Trunk 4 proceeds east through Port Hawkesbury and St. Peter's before turning northeast along the southeastern shore of Bras d'Or Lake through Big Pond and Ben Eoin. It continues east to Sydney River to Sydney. In Sydney it follows Kings Road, Esplanade Road, Welton Street. East of Sydney it continues along Grand Lake Road to Reserve Mines and Glace Bay. In Glace Bay it follows Reserve Street and Union Street and ends at the intersection of Union and Commercial Streets. Blue Route Because a large portion of the highway has been paralleled by the faster Highway 104, traffic volumes are comparatively light. As a result, parts of Trunk 4 are currently under review to become part of Nova Scotia's Blue Route, a designated cycling corridor. History Trunk 4 originally started at the New Brunswick border in Fort Lawrence. In the early years of the Trans-Canada Highway system, Trunk 4 was the designated Trans-Canada Highway route across mainland Nova Scotia. When controlled-access sections of Highway 104 were first built in the 1960s, the number replaced Trunk 4 entirely west of New Glasgow. As four-lane sections of Highway 104 were built in the late 1990s, the number 4 was again used to mark the former Mount Thom and Wentworth Valley sections of 104. Original sections of historic Trunk 4 (west to east) NB-NS border to Monastery part of Cumberland Loop in Fort Lawrence serving the Nova Scotia Dept of Tourism visitor information centre is a former Trunk 4 alignment Laplanche Street in Fort Lawrence Laplanche Street, Church Street, and Albion Street in Amherst Trunk 2 from Amherst to Springhill Highway 321 from Springhill to Oxford Highway 204 from Oxford to Streets Ridge (old road alignment visible at realigned intersection) Highway 368 from Streets Ridge to Mahoneys Corner current section of Trunk 4 from Mahoneys Corner to Glenholme Glenholme Road in