When driving in the city you should scan the road at least by 1 to 1.5 blocks to ensure safety of everyone.
When driving ANYWHERE you should always scan as far as you can see. If you can see a mile up the road and there is a vehicle turned sideways in the road, you can start preparing for any event that may occur.
You should scan ahead as far as you can see
Look as far as possible to scan for any dangers, look too close, things move to fast, looking further ahead means things come slower
In the city, 10-15 seconds is about one block. On the highway, 10-15 seconds is about a quarter of a mile.
You should aim to scan the road about 12 to 15 seconds ahead of your vehicle. This distance allows you to anticipate potential hazards, changes in traffic, and road conditions, giving you ample time to react. In urban areas, that translates to about one city block, while on highways, it can be a quarter to half a mile. Regularly scanning your surroundings can enhance your overall driving safety.
1 sec after its happens.
You should see as far ahead as you can. The farther you can see, the more time you have to prepare for whatever your are approaching, and for whatever is approaching you.
On city streets drivers should cast their eyes how far ahead?
You should scan ahead as far as possible. Do not fixate on the vehicle in front of you. Look down the road and expect the worse. If there is a car at an intersection expect it to pull out in front of you. If there is an oncoming car expect it to come into your lane and be prepared to take evasive action.
False
On city streets, you should maintain a safe following distance (two seconds) from the car ahead of you. Keep a constant scan going for signs, traffic lights, pedestrians, bicycles, and anything else that might create an emergency situation. Look past the car ahead of you for obstacles and brake lights from the car in front of the one you're following.