Trucking terms starting with H
Hammer Lane The left or passing lane on a highway. Hazmat Endorsement A CDL endorsement required for certain hazardous materials transportation. Headache Rack A rack behind the cab used on some trucks to store gear and help shield the cab. Headhaul The primary outbound direction on a lane, often the higher-demand side of a freight market. HMR Hazardous Materials Regulations, rules governing certain hazmat transportation. HOS Hours of service, the rules limiting and tracking commercial driver work and driving time. Hundred Dollar Lane A lane where a driver risks a ticket, often tied to restricted or passing lanes.