Bus drivers have high rates of back problems, one-sided sedentary work and stress from schedules and traffic. Here are the three major strains — seating/ergonomics, whole-body vibration and mental work environment — with the Danish Working Environment Authority's action and limit values for vibration and the concrete things you and your employer can do.
Introduction
A bus driver sits most of the working day, in the same position, while the whole body is exposed to vibrations from road and engine — and at the same time the brain must maintain constant attention to traffic, timetable and passengers. It is a combination of physical sedentary strain, whole-body vibrations and psychological stress, which together explain why back and neck problems and stress are widespread in the trade. Health, ergonomics and prevention of physical risk are one of the basic qualification's three major subject areas (Directive (EU) 2022/2561, Annex I).
Sitting position and ergonomics
Sedentary work in a fixed position particularly strains the back, neck and shoulders. A properly adjusted driver position is therefore not a luxury but prevention. Seat, steering wheel and mirrors must be adjusted to your body every time you take over a bus you share with other drivers. The aim is that you can reach all controls without stretching or twisting, and that your back is supported.
- 01Adjust seat height and distance so you reach the pedals without stretching, with easily bent knees.
- 02Set the backrest so the lower back is supported — use a lumbar cushion/support if the seat has one.
- 03Adjust steering wheel and mirrors AFTER the seat so you do not twist your neck or back to see out.
- 04Use the air-suspended seat correctly — adjust the suspension to your weight, not just to your predecessor's.
- 05Change position and stretch during breaks; stand up and walk a bit at the final stop.
Whole body vibrations
When the whole body vibrates through the seat — from road bumps, engine and undercarriage — it is called whole-body vibration. Prolonged exposure increases the risk of lower back disorders. The Working Environment Authority sets two levels for daily vibration exposure A(8), measured over an 8-hour reference period: an action value where the employer must take action, and a limit value that must never be exceeded.
| Whole-body vibration, daily exposure A(8) | Value | Meaning |
|---|---|---|
| Action value | 0,5 m/s² | If it is exceeded, the employer must investigate the cause and limit the load |
| Limit value | 1,15 m/s² | Must not be exceeded under any circumstances |
The values are stated in the Danish Working Environment Authority's regulation on protection against exposure to vibration at work. Vibration exposure is dampened primarily by a well-functioning, correctly adjusted suspended seat and a bus with well-maintained suspension — and by driving smoothly over bumps and holes. The energy-conscious, forward-looking driving style (see the article on eco-driving) also reduces the jerks that cause vibrations.
- 01Choose and adjust the suspension seat correctly — it is the most important single measure.
- 02Report faulty suspension or worn seat to the driver; it is a work environment fault.
- 03Drive gently over bumps and kerbs — harsh driving increases vibration exposure.
- 04When action value is exceeded, the employer has a duty to reduce the load (e.g. new seat, maintenance, shorter trips).
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