This is based on old data, but when I was working in energy consulting the number of miles driven per registered vehicle did not change much from year to year e

This is based on old data, but when I was working in energy consulting the number of miles driven per registered vehicle did not change much from year to year except when there were supply disruptions. Also, miles driven was an estimate based on hard numbers like the number of registered vehicles so not a great indicator. Here is some recent info on US vehicle registration: http://usa.streetsblog.org/2013/06/21/has-america-already-hit-peak-car/ http://usa.streetsblog.org/2013/06/21/has-america-already-hi...