The Ambassador Bridge across the Detroit River is closer to maximum vehicle capacity than was previously believed, according to a research study released by economists at the Booker T Washington Business Association in Detroit. Jams at the US/Canadian border routinely delay truckers by at least an hour, say the authors. The team calculated that the bridge system generally operates at 92% of its capacity and significantly exceeds capacity for many hours a day. Several proposals are being discussed for new crossings between the US and Canada.