Final answer:
Both drivers and cyclists should check their mirrors and do a head check before changing lanes to prevent collisions and ensure road safety.
Step-by-step explanation:
The question pertains to safe driving practices. Both drivers and cyclists should check their mirrors and make a head check before they change lanes. This is a crucial step in ensuring road safety as it helps in identifying any vehicles that may be in the driver's or cyclist's blind spot. It is recommended that a driver or cyclist signals their intention to change lanes, checks mirrors for rear and side traffic, and then performs a quick head check by turning their head to look over their shoulder before changing lanes. This comprehensive check helps to prevent collisions and ensures that the change of lanes is done safely.