Highway 91A crosses the Queensborough Bridge and terminates at Marine Way, allowing traffic into New Westminster.

Residents of New Westminster can use Highway 91A as a convenient route towards the Canada/U.S.

The interchange with Marine Way was reconstructed in the late 2000s as part of a $211-million-dollar project to improve access to Lower Mainland border crossings.

Median barriers were also installed on Highway 91A over the Queensborough Bridge, and the Howes Street intersection was upgraded to a full interchange.

[3] The entire route is in Metro Vancouver Regional District.