What must drivers do when sharing a lane with a bicycle?

When sharing a lane with a bicycle, drivers are required to yield to bicycles when it is safe to do so. This means that if there is a situation where a bicycle is in the same lane as a vehicle, the driver should give the bicycle space and allow it to proceed safely. This practice is essential for promoting safety on the road and ensuring that both cyclists and drivers can coexist without causing dangerous situations.

Yielding to bicycles helps prevent accidents and encourages respectful interaction between different types of road users. It is important for drivers to be aware of their surroundings and to look out for cyclists, as they may not be as visible or may not have the same protections as vehicles do.

The other options would lead to unsafe driving behaviors. Speeding up to pass might endanger the cyclist, obstructing the lane could cause confusion and accidents, and merging into bicycle lanes at all times is not practical and could put cyclists at risk. Thus, yielding when it is safe is the appropriate and safest action for drivers.