» Michigan Department of Transportation    Official website.    http://www.michigan.gov/mdot/

» Michigan State Highways    Details on all of the state trunklines and their history, plus other highway facts.    http://www.michiganhighways.org/

» A Guide to Highways in Upper Michigan    Gives descriptions of facilities in the Upper Peninsula as well as listing personal ideas for improvements.    http://www.geocities.com/lukefisk.geo/highways.html

» BT's Detroit Road Guide    Descriptions of numbered routes.    http://btcentral1.tripod.com/BTDR.html

» County Road Association of Michigan    Organization representing the interests of the state's county road agencies. Information on each agency.    http://www.micountyroads.org/

» Detroit Highways    Contains route logs, historical information, and personal observations.    http://people.ku.edu/~afarina/recreation/highways/

» Great Lakes Circle Tour    Covers the signed tours around the lakes.    http://www.great-lakes.net/tourism/circletour/

» MPG Roads    Various topics on the state as well as Georgia and Pennsylvania.    http://www.gribblenation.net/mpg/

» Michiana Roads    Information and photos covering Southwestern Michigan and North-Central Indiana (Greater South Bend).    http://www.roadfan.com/michroad.html

» US-12 Heritage Trail    Page describing the Historic Heritage Route. Includes tour detail files, history, FAQ, newsletter, and links.    http://www.us12heritagetrail.org/