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Every question starts with a CompanyDriver answer. Open a question to read it, then visit Driver answers to share your experience. Rules can vary by state, vehicle, cargo, and operation; check the applicable official guidance.
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Fuel and DEFWhat is an APU?
An auxiliary power unit provides selected cab power or climate functions without relying on main-engine idling. Capabilities and maintenance needs differ by model.
Driver answers (0) · Add your answer →Fuel and DEFCan low DEF cause the truck to lose power?
Some systems can restrict operation when DEF is low or faults occur. Follow warnings and contact maintenance rather than trying to bypass emissions controls.
Driver answers (0) · Add your answer →Fuel and DEFHow do I store spare DEF?
Use approved clean containers and manufacturer storage guidance. Contamination and unsuitable storage can affect quality and equipment performance.
Driver answers (0) · Add your answer →Fuel and DEFWhat if I discover water in the fuel system?
Notify maintenance and follow the manufacturer’s procedure. Do not continue blindly or drain components without training and authorization.
Driver answers (0) · Add your answer →Fuel and DEFShould I compare fuel prices without considering detour miles?
No. Include extra distance, time, tolls, authorized-network terms, and remaining hours. A lower pump price may not produce a cheaper trip.
Driver answers (0) · Add your answer →Weight and Scale PlanningWhy should I scale a loaded trailer?
It helps verify gross and axle loading for the planned route. A legal total weight does not guarantee each axle group is legal.
Driver answers (0) · Add your answer →Weight and Scale PlanningWhat is axle weight?
It is weight supported by an axle or axle group. Applicable limits depend on configuration, spacing, jurisdiction, and any valid permit.
Driver answers (0) · Add your answer →Weight and Scale PlanningWhat is gross vehicle weight?
It is the actual total weight of the vehicle or combination and load. Do not confuse it with the manufacturer’s rating or legal route limit.
Driver answers (0) · Add your answer →Weight and Scale PlanningHow does sliding trailer tandems change weight distribution?
It changes the support positions and can redistribute axle loads. Follow equipment procedures, secure the pins, and reweigh rather than relying only on a rule of thumb.
Driver answers (0) · Add your answer →Weight and Scale PlanningHow does moving the fifth wheel affect axle loading?
It changes the tractor’s load distribution and clearances. Only adjust under approved procedures and verify weights and safe tractor-trailer clearance afterward.
Driver answers (0) · Add your answer →Weight and Scale PlanningCan I assume every highway allows the same truck weight?
No. Federal, state, local, bridge, seasonal, and permit limits may differ. Check the actual route and configuration.
Driver answers (0) · Add your answer →Weight and Scale PlanningWhat is a bridge formula?
It relates allowable weight to axle count and spacing for certain operations. A simple gross-weight check alone may miss a bridge-formula violation.
Driver answers (0) · Add your answer →Weight and Scale PlanningWhat if a shipper loads too much weight?
Document scale results and contact dispatch and the shipper for correction. Do not depart on a route where the load is unlawful.
Driver answers (0) · Add your answer →Weight and Scale PlanningShould I weigh before or after fueling?
Plan for the weight of expected fuel and other supplies. A legal scale result with nearly empty tanks may change after fueling.
Driver answers (0) · Add your answer →Weight and Scale PlanningWhat should I do with a scale ticket?
Keep it with trip records and use it to verify relevant weights. Reweigh after meaningful load or axle-position changes.
Driver answers (0) · Add your answer →Weight and Scale PlanningCan a permit legalize any overweight load?
No. Permits have specific vehicles, loads, routes, dates, and conditions. Verify eligibility and compliance before moving.
Driver answers (0) · Add your answer →Weight and Scale PlanningWhat is an oversize load?
It exceeds an applicable dimension limit. Requirements can include permits, routes, escorts, signs, lights, or travel restrictions depending on the jurisdiction.
Driver answers (0) · Add your answer →Weight and Scale PlanningDo I have to enter every weigh station?
Follow signs, vehicle requirements, and valid bypass instructions. Do not assume another truck’s behavior applies to yours.
Driver answers (0) · Add your answer →Weight and Scale PlanningCan I ignore an open scale because my app says closed?
No. Follow current official signs and applicable instructions. Apps and map entries may be outdated.
Driver answers (0) · Add your answer →Weight and Scale PlanningWhat if a bypass transponder gives conflicting instructions?
Follow posted and official requirements and your system’s guidance for conflicts. Ask the carrier how to handle the specific equipment before the next trip.
Driver answers (0) · Add your answer →Weight and Scale PlanningDoes cargo shifting affect axle weights?
Yes. Movement can change distribution and stability. Stop safely and obtain appropriate inspection or correction when shifting is suspected.
Driver answers (0) · Add your answer →Weight and Scale PlanningAre steer-axle limits always the same?
No. Applicable limits depend on law, equipment ratings, tires, and configuration. Verify the actual requirements rather than assuming one universal number.
Driver answers (0) · Add your answer →Weight and Scale PlanningWhat is a scale reweigh?
It is a subsequent weighing, often after adjusting distribution. Check the facility’s current process and retain the updated results.
Driver answers (0) · Add your answer →Weight and Scale PlanningCan I move tandems on a busy roadway?
Use a safe authorized location and the proper equipment procedure. Do not place yourself near moving traffic or work on unsecured equipment.
Driver answers (0) · Add your answer →Weight and Scale PlanningHow do I avoid overweight surprises on multi-stop loads?
Consider each loading and unloading stage, changing distribution, fuel, and route limits. Ask for load planning and scale checks when needed.
Driver answers (0) · Add your answer →Have a question we missed?
Ask about the road, the work, or life as a driver. CompanyDriver reviews new questions and adds a starter answer before publishing.