You must always be aware of the height of your vehicle you’re driving, especially if you drive a range of different size vehicles.
Special maps are published to show you weight and height limits on road in the UK.

There could also be more signs showing height and width restrictions. If you’re driving a high vehicle, make sure that there’s enough headroom available for you to go ahead through the tunnel.

In addition to height restrictions the tunnel may have restrictions with regard to the available width of headroom for high vehicles. The advance warning gives you the chance to change your route if your vehicle id too high or wide to go through the tunnel.

Always make sure you know the height of your vehicle and take extra care when approaching hazards where there is a height limited. Don’t take any risks and always stop if you are unsure. If you aren’t sure make another route.

When the minimum height is not showing on the bridge the headroom (in the UK) will be a minimum of 5 metres (16 feet 6 inches)

If you hit a bridge with your vehicle, it can have some serious outcomes for the road and the rail traffic. If the bridge is a railway bridge, you must immediately phone the railway authority and also the police as soon as possible.

It is very important that the railway authority are given all the correct information promptly, this is so that they can take action to stop railways passengers being put at risk.

When you vehicle exceeds the safe travelling height beneath overhead cables, bells are suspended over the road will give an audible warning. If your vehicle disturbs these bells, you must stop immediately and do not continue further until you have been giving further advice.

You must always know the size of your vehicle. Make sure you look out for road signs that show you width and height restrictions. There should be an indication of width or height restrictions at the start of the road.

Do not get into a situation where you have no option but to reverse out of a narrow road because you haven’t seen the signs.

Warning lights show when there are dangers ahead, such as
Lanes closures
Accidents
Fog
Icy Roads

When travelling on the motorway, always look out for variable-message warning signs advising you of:
Lanes Closures
Speed Limits
Hazards

Always be alert for problems and situations where the size of your vehicle could make thing difficult. You should always know exactly what the height, weight, width, and ground clearance of your vehicle. If you are in any doubt, do not attempt to go places where you may have to reverse an unreasonable distance.

Always look out for restrictions for long vehicles. There are a few, compared to height or width restrictions but there found where turning facilities are restricted or there’s a risk of grounding.

Be alert for signs that will give you warning in advance of height restrictions. As a professional driver you should always know the height of your vehicle or load. If you aren’t very sure of the safe height, STOP and check. Do not take risks!

On single track roads, if your vehicle is too long to get completely into a passing place you may need to wait opposite it to allow a following or approaching road user to pass. When you use this kind of road you will need to plan and look ahead to avoid meeting another road user at an inappropriate place.

In winter weather conditions can affect all types of roads. Do not be misled by other drivers who are driving too fast. The gentlest braking can lock your wheels in ice. If your front wheel locks and you can’t steer, if you cannot steer, you cannot keep out of trouble.

When travelling on icy road the separation distance is very important, you can never have too much space between u and another vehicle. Motorways that may appear or look wet may actually be frozen. Remember that all breaking should be carried out gently to stop you losing control.

On Motorways with more than two lanes, trailers and caravans must not be towed in the outside lane unless there is a lane closure.

When you over take with a long vehicle it is very important to be aware of the position of the road user you are overtaking. You must always carefully check your nearside mirror to ensure that you have passed safely before returning to the left of the road.
With motorcyclists being a vulnerable road user they need special attention as they may be affected by buffeting from your vehicle.

A vehicle is more stable when it is travelling in a straight line under gentle acceleration. Severe loss of control can be caused by sudden acceleration, steering or braking.
Your driving should be as smooth as possible.