In addition to CBP, various agencies have responsibilities for facilitating trade at land ports of entry and conducting inspections of commercial vehicles. GSA oversees design, construction, and maintenance for all ports of entry in consultation with CBP. In consultation with GSA, CBP develops an investment plan to manage the modernization of the land ports of entry inventory. Within DOT, FHWA provides funding for highway and road construction. In addition, the Federal Motor Carrier Safety Administration and state DOTs in some states-Arizona, Texas, and California on the southwest border-may conduct commercial vehicle inspections at or adjacent to land ports of entry to ensure compliance with federal and state-specific safety standards.