Night PSV Run with a Fatigued Driver on Cough Syrup
Samuel, a 46-year-old matatu driver, is on a 160 km night run from Nairobi to Nakuru in a 14-seater PSV. He began driving at 05:00 the previous day, completed three short trips, and slept only about three hours before starting this run at 22:30. At 02:00 he is 40 km from Nakuru, carrying 18 adult passengers plus luggage. He has a dry cough and took a 10 ml dose of chlorpheniramine cough syrup at 20:00. For the last 15 km he has crossed the centre line twice and missed a speed hump warning. The road is dry, traffic is light, and the next town with a 24-hour stage is 12 km ahead. His conductor says they should push on because passengers are complaining about delay. Samuel feels alert but admits his eyes are heavy.
1. Assess Samuel's fitness to continue driving. Identify the factors that matter most and explain how they interact.
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Samuel is not fit to continue. The main factors are cumulative sleep debt, the time of day, the sedating antihistamine, and the overloaded PSV.
- He has had about three hours' sleep after a long duty day, so his baseline alertness is already low.
- Chlorpheniramine is a first-generation antihistamine with marked drowsiness. Even a 10 ml dose at 20:00 can impair attention and reaction time for several hours, and the effect is additive with fatigue.
- The lane crossings and missed speed hump are objective signs of impairment, not just tiredness.
- Driving at 02:00 also hits the circadian low, when alertness naturally falls.
- The 18 passengers in a 14-seater increase noise, stress, and stopping distance. The conductor's pressure is not a safety factor.
- The fact that only 12 km remain is irrelevant: fatigue crashes often happen close to the destination because the driver relaxes.
The correct judgement is to stop at a safe place, hand over to a relief driver or arrange alternative transport, and record the decision.
2. What should Samuel and the operator do in the next 30 minutes to protect the passengers and comply with PSV obligations?
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Samuel should slow down, signal, and stop at the first safe lay-by, petrol station, or police post, not on a blind curve. He should switch on hazard lights, secure the vehicle, and tell passengers clearly that the trip is paused for safety. The conductor should account for all passengers and keep them away from the carriageway.
Samuel should call the operator and state the symptoms, the medication, and the passenger count. The operator should send a relief driver or authorised alternative vehicle. Passengers should not be left stranded at night without information. If no relief is available within a reasonable time, the operator should arrange safe alternative transport and refund or rebook.
Samuel should not take caffeine or another stimulant to 'push through'. The operator should record the incident, review the driver's duty and rest hours, and ensure the PSV is not dispatched with 18 passengers in a 14-seater. If the vehicle moves again, the overload must be corrected first.