Federal safety leaders have updated vehicle marking rules for cargo tanks hauling fuel. The new rule eases placarding duties for multi-compartment tank trucks hauling different fuels on the same shift. This change stops drivers from flipping signs between trips while keeping responders safe.

Marking Multi-Fuel Cargo Tanks

Under old rules, drivers had to swap identification signs each time they changed fuel loads. Drivers hauling gas, diesel, fuel oil, and kerosene faced constant sign flips at the rack. Rules from PHMSA now allow tanks to display the number for the fuel with the lowest flash point hauled that day.

This relief means a tanker carrying diesel fuel can keep showing the gasoline number if gas was hauled earlier that day. Gasoline has a much lower flash point than diesel and catches fire faster. Fire crews already use high caution when they see the lower flash point sign on a tank shell.

Safety partners at HazmatNation note that this change keeps drivers safer at fuel racks. Drivers do not need to walk through rack lanes to change sign panels. This simple update saves time and cuts delays for commercial fleets.

Equipment Standards and Trailer Markings

Fuel tankers made by builders like Heil Trailer often use multiple tank bays to haul mixed loads. Fleet teams must make sure all discharge valves and pipe lines seal tight during product swaps. Good shop care stops leaks between fuels that catch fire at different heats.

Fleets must still follow strict marking rules for fuels with high amounts of ethanol. High-blend ethanol fuels still require their own separate identification numbers on trailer signs. Fleet managers should check that dispatch logs match the real loads in each tank bay.

The federal update also allows reflective wraps instead of paint on cargo tank shells. Bright wraps help drivers see big tankers at night to avoid rear-end crashes. Shop leaders must verify that wrap materials meet federal reflectivity codes before placing them on tank trailers.

Driver Training and Compliance Steps

Safety teams must train drivers on how to use the lowest flash point rule. Drivers must know which fuels qualify under the new standard before leaving the fuel rack. Drivers must still keep accurate shipping papers in the cab for every single load.

Motor carriers under the FMCSA Hazmat Regulations must keep clear records of all daily fuel trips. Clean logs protect your fleet during roadside checks and state audits. Teaching drivers these new marking rules keeps your trucks compliant and stops terminal delays.

Also read: Stopping Driver Fatigue in Hazmat Fleet Operations