According to the U.S. Department of Transportation, approximately one-third of the nation’s residents don’t have driver’s licenses. In her 2024 book “When Driving is Not an Option: Steering Away from Car Dependency,” disability advocate Anna Zivarts argues that not only is America’s car-centric infrastructure harmful to the climate, it also fails to meet the everyday needs of many Americans.
Sure, a bike can use the same roads cars are using. Have fun with that.
Btw. a train track can be used by cargo trains, passenger trains, trains carrying cars, trains carrying bikes, etc. If you build decent bike lanes, they can even be used by ambulances to skip traffic.