Where can I find information on (FM) Farm to Market Roads or State Highways?

Questions regarding (FM) Farm to Market Roads or State Highways can be found through the following agencies:

• City of Houston | Home Page - http://www.houstontx.gov/
• TxDOT | Texas Natural Resources Information System - http://www.tnris.org/
• TxDOT | Load Zone Bridge Locations - http://www.txdot.gov/inside-txdot/division/bridge.html