On undivided roadways, be constantly alert for situations that might cause on-coming vehicles to swerve into your lane, such as:
- drivers attempting to pass another vehicle
- drivers forced into your lane by another vehicle
- worn out lane markings or covered by mud/dust
- drivers swerving to avoid a pedestrian or bicycle
- a drunk, drowsy or disoriented driver
- a driver forced out of its lane due to over speeding