Because the bridges carry 40,000 vehicles a day across the Ohio River on average, and because the nearest alternate crossings over the Ohio River are more than 40 miles up or downstream, bottlenecks and congestion are frequent, and can be caused even by a stalled vehicle as neither bridge has shoulders, while an accident can cause travel time on the 5 mile stretch between Evansville and Henderson to take at least an hour. This problem is expected to be relieved by the planned construction of the Interstate 69 bridge over the Ohio River, which is scheduled to begin sometime in 2021.