Relating to the designation of routes for the movement of oversize and overweight vehicles in certain counties.

HB 4605 requires Texas Department of Transportation (TxDOT) to consult with county commissioners courts in small counties (under 100,000 population near a port) when designating routes for oversize/overweight vehicles in unincorporated areas. The county must consider factors like port proximity, road safety, environmental impacts, and economic benefits before recommending routes. TxDOT then installs signs for these routes and allocates highway funds for their maintenance, while the Department of Public Safety enforces related rules. The bill applies only to routing decisions made on or after its September 1, 2025 effective date.