Final answer:
When entering a highway or street from a private driveway, you must generally stop first to ensure safety, due to other vehicles potentially speeding and having the right of way.
Step-by-step explanation:
When entering a highway or street from a private driveway, even when the way appears clear, it is generally required to stop before merging with traffic. This is a legal requirement to ensure safety because vehicles on the main road have the right of way. However, laws can vary by jurisdiction, so always check local traffic laws. It is crucial to stop first because many vehicles may speed through the intersection without regard to the posted speed limit, and the dynamics of vehicles' speeds may not always be predictable. Also, if a car is approaching you and is only 28 meters away, this may not provide sufficient time for you to safely cross the road considering the average reaction time and stopping distance for most vehicles.