The company which owns the Ambassador Bridge proposed its own twin span with six lanes to be built across the Detroit River. Cost estimates range from one to two billion U.S. dollars to build a second span. The new span would be a cable-stayed bridge and would accommodate the bulk of the cross-border traffic with the original span being used for overflow traffic. However, a twin span adjacent to the Ambassador Bridge, by itself, does not address Canadian concerns about traffic on Huron Church Road in Windsor. While many of the stop lights commonly cited have been removed by the expansion of the 401 which will connect to the downriver Howe bridge, the final approach to the Ambassador Bridge remains on overcrowded Windsor surface streets.