HB 4605 grants counties with populations under 100,000 that contain or are near a port the ability to designate routes for oversized and overweight vehicles. The bill requires the Texas Department of Transportation (TxDOT) to consult with county commissioners before finalizing route designations and mandates coordination with port authorities, regional planning organizations, and trucking industry stakeholders. TxDOT is responsible for installing signs for designated routes and allocating highway funds for their maintenance, while the Department of Public Safety (DPS) will oversee enforcement​.