This GDOT bill amends state law to conform with federal law by increasing the maximum length of certain tractor semitrailers from 75 feet to 97 feet and allowing a modular unit transporter to carry two modular housing units if it meets certain requirements. The bill also amends weight limit laws. If a weight limit citation is issued on a superload plus permit, the penalty assessed is only based on the excess weight greater than that allowed by the permit. The bill provides trucks that have idle reduction technology an exemption from any penalty incurred due to the weight caused by the technology. HB 1174 would allow law enforcement to use radar as evidence on state roads with variable speed limits.