Hi,

does anyone have referenceble information on:

what is the average automobile commute length (North America)

What is the average automovbile errand length (North america)

thanks

You may want to search or contact the NTSB or Federal Highway Administration, or at least search their sites. There's some info on times http://www.census.gov/Press-Release/www/releases/archives/american_community_survey_acs/004489.html
and an ABC News Poll that includes distances.
http://abcnews.go.com/technology/traffic/story?id=485098