An Act amending the act of June 1, 1945 (P.L.1242, No.428), known as the State Highway Law, in special provisions affecting local authorities, providing for Road Salt Management Best Practices Guide.

HB 664 amends Pennsylvania's State Highway Law to require local authorities responsible for road maintenance to adopt a Road Salt Management Best Practices Guide. The bill directly affects municipalities and county road departments that apply salt to roads during winter weather. Key provisions mandate the creation and implementation of a standardized guide focused on reducing environmental harm from road salt use, such as protecting waterways and infrastructure. This policy change shifts responsibility to local entities to follow scientifically supported practices for salt application, without altering funding or enforcement mechanisms. The bill passed in October 2025 and now awaits referral to the Transportation committee for implementation oversight.