Connaught Tunnel is not supplemented by the Mount Macdonald Tunnel.
In the late 1980s , the Mount Macdonald Tunnel was built to supplement the Connaught Tunnel and to lessen the grade on the eastern approach to the pass .	Mount Macdonald	Mount Macdonald	Connaught	Connacht	Mount Macdonald Tunnel	Mount Macdonald Tunnel
