A driver who is traveling with an awake, engaged passenger is generally considered least at risk for drowsy driving, compared with similar drivers who are alone.
Why passengers lower risk
Having a passenger can help keep the driver mentally engaged through conversation and can notice early signs of fatigue such as drifting, yawning, or inconsistent speed. Passengers can also encourage the driver to stop and rest or take over driving if they see the driver becoming too tired.
Who is more at risk
Certain groups are consistently identified as higher risk for drowsy driving than typical drivers with passengers. These include:
- Young drivers, especially males under 25.
- Shift workers and people with long or night shifts.
- Commercial and long-haul drivers.
- People with untreated sleep disorders or using sedating medications.
Key comparison
Driver type| Relative drowsy-driving risk*
---|---
Driver with passenger| Lowest risk among listed types 14
Typical solo driver| Moderate baseline risk 4
Young driver (<25)| Higher risk than older adults 235
Shift/night worker| Much higher risk, especially night shift 235
Commercial long-haul driver| Much higher risk 234
*Even with a passenger, any driver can still be at risk if sleep-deprived or impaired, so adequate rest is always essential.
