Safe Vehicle Loading 1 Flashcards

What is the maximum permitted rear axle weight for a typical two-axle coach operating on UK roads?

Answer: 11,500 kg

UK regulations set the maximum rear axle weight for a two-axle vehicle at 11,500 kg. Exceeding this limit places illegal stress on the road surface and compromises vehicle braking and handling, regardless of whether the gross vehicle weight is within limits.

When luggage is carried on a roof-mounted rack fitted to a PCV, what is the primary safety concern a driver must consider?

Answer: The raised centre of gravity increases the risk of rollover

Loading weight on a roof rack raises the vehicle's centre of gravity significantly. This increases the risk of rollover during cornering or emergency manoeuvres, making it essential to keep roof loads as light as possible and well within the manufacturer's rated limit.

If a DVSA officer discovers at a roadside check that a coach is carrying an illegal overload, who may face prosecution?

Answer: Both the driver and the operator

Under UK road traffic law, both the driver and the operator can be prosecuted for an overloading offence. The driver is responsible for not driving an unsafe vehicle, and the operator is responsible for ensuring vehicles leave their premises within legal weight limits.

How does an uneven fore-and-aft weight distribution in a heavily loaded coach primarily affect vehicle handling?

Answer: It can lighten steering feel and reduce braking effectiveness

When weight is unevenly distributed front-to-rear, the front axle may carry less load than designed, making steering feel vague and less responsive. Braking is also affected because tyre-to-road contact forces are no longer balanced as the manufacturer intended.

At what points during a journey should a PCV driver verify that items stored in passenger overhead luggage racks remain secure?

Answer: At the start of the journey and again after any emergency stop or sharp manoeuvre

Luggage should be confirmed secure before departure, but sudden braking or sharp steering can dislodge poorly stowed items. After any emergency stop or abrupt manoeuvre the driver should ensure overhead items have not shifted into a position where they could fall on passengers.

How does carrying a full load of passengers on the upper deck of a double-decker bus affect its stability compared with an equivalent load on the lower deck?

Answer: Upper-deck loading raises the centre of gravity, reducing resistance to rollover

Passengers seated on the upper deck sit higher above the vehicle's roll axis, raising the overall centre of gravity. This reduces the bus's resistance to rolling over during cornering or when traversing a camber, which is why operators must follow approved standing and seating guidelines that account for deck loading.