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The Ontario Ministry of Transportation’s Transit Supportive Guidelines provide employment and resident density thresholds to support different levels of service and different types of infrastructure. These thresholds enable cost-effective transit investment that effectively generates ridership and revenue and manages congestion. Metrolinx, a regional transportation authority akin to Metro Vancouver’s TransLink, has similar thresholds to guide the development of its Mobility Hubs. TransLink has recently developed complementary Transit-Oriented Community guidelines, establishing density thresholds for transit service. B.C.’s municipalities and public transportation authorities (TransLink and BC Transit) would benefit from clearer guidelines to support integrated land-use and transportation planning that cost effectively cut congestion and carbon. While Metrolinx and TransLink guidelines go above and beyond density, outlining supportive land-use and urban design, density is a critical foundation.