St. Lambert is four miles from Central Station over the St. Lawrence River on the Victoria bridge. While experience with it is, granted, from the corridor service to Quebec and the "Ocean" to Halifax. I have never noticed a lot of passengers there. Get the customs clearance for both countries in Central Station and speed the train up.The only factor driving the decision would be Amtrak's loads from Saint-Lambert to points in NYS, which based on observation can be quite significant.