Traffic flow

Traffic flow is how people and cars move on the roads and streets. When the roads are busy, it can be hard for people and cars to get where they need to go because of all the traffic. To help with this, traffic engineers plan how people and cars should move, like which streets they will use, which way they can turn, and when they will get a turn if they have to wait. To keep things moving, there are also traffic lights and stop signs. This helps cars and people move safely and without getting stuck.