In 1981, during Bill Davis's Progressive Conservative administration, the Province of Ontario offered to finance the construction of a light metro in Hamilton from Lloyd D. Jackson Square to the Lime Ridge Mall.

The plan called for an elevated track – one of the elements that triggered opposition, with residents suggesting commuters would be invading their privacy by looking down on their back-yards and in their second floor windows.

[6] On December 16, 2019, the Government of Ontario announced it was cancelling its funding for the BLAST system's B-Line LRT, due to cost overruns.

[10] The B-Line LRT and A-Line BRT are the top transit priorities for the City of Hamilton and were originally scheduled for completion in 2024.

On November 6, 2024, Metrolinx issued a request for qualifications for utility relocation and renewal, roads, sidewalks and traffic control signals along the B-Line route.