Car commuting has yet to reach a peak as a principle means of transportation. Car use has increased to 88.1%, while "working at home" has also increased to 3.1%. (Despite the networking revolution, this has only increased by 0.1% since 1985)
Bicycling has gone down to 0.6% from a high of 1.0% in 1985.
ref: US Bureau of Transportation Statistics table