Diesel exhaust fluid explained for heavy haul: what DEF is made of, how much your truck burns, what bulk and jug DEF cost, freezing point, shelf life, and derate rules that affect route planning.

Steer axle weight limits, tire ratings, and the Federal Bridge Formula decide whether a heavy haul load scales legally. A practical guide to axle weight distribution, state rules, and rebalancing before you roll.

Car navigation apps route oversize loads into low bridges and truck-banned roads. Compare the best truck GPS units, the features that matter for heavy haul, and how to layer GPS with permit-aware route planning.

Oversize load permits typically cost $15 to $75 per single trip, plus per-mile surcharges, service fees, escorts and route surveys. Here is how permit pricing really works in 2026.

Oversize load signs and flags are the cheapest compliance win in heavy haul. Learn required flag sizes, sign lettering and mounting, nighttime lighting rules, and how requirements vary by state.

Pilot car requirements change at every state line. Learn when escort vehicles are required, typical width and height thresholds, equipment and certification rules, and how to plan multi-state oversized load hauls without surprises.

Lowboy, RGN, step deck, extendable, and modular trailers explained — learn which heavy haul trailer fits your oversized load before you pull a permit.

Learn the DOT hours of service rules for truck drivers: the 11-hour driving limit, 14-hour on-duty window, 30-minute break rule, 10-hour rest, and 60/7 and 70/8 weekly caps — plus how HOS rules affect oversized load hauls.

Truck weight limits by state vary far more than most owner-operators expect. Learn the 80,000-pound federal baseline, axle and bridge formula rules, and how oversize/overweight permits change the math for heavy haul routes.

Learn everything about oversize load insurance for heavy haul truckers — coverage types, cost factors, average premiums, and tips for finding the right policy to protect your trucking business.