Answer
Their primary duty is to investigate the cause of the accident, determine fault to their best ability, take action (DUI arrests, etc.) and issue citations.
They make sure cars take a detour.
If the accident was reported to the police at the time it occurred, I believe a report can be filed, although it should have been filed ASAP. Check with your insurance company and state regulations.
You can get an accident report at the police station.
It depends, whether it is a major accident or if it's just minor. Also, it depends on if there's someone nearby. Generally, if there's a major accident to be seen and no one is around, then it's always safe the call the police immediately and to provide assistance if needed.If you spot a minor accident, yet you're not involved in it, then there's not need to inform the police or any other emergency services.If you have been involved in a minor accident, even if no one has been injured, you are required to inform the police via emergency number. In this case, it is because a police report is required in order to help the insurance to determine where the problem started and/or whose fault it was.
accident report
One can find police accident reports on the official websites of the state. An example is the official website of New Jersey. One can read the police accident reports in .pdf form.
you can not leave the scene of a accident
Has this car been in an accident?
Yes, you will need to report your accident to the police. You should report all accidents to the police, so that you can file a claim with your insurance.
The only way a police office can write a report of an accident he did not witness is to take statements from people that did witness the accident. He can also look at the accident and determine how it most likely occurred.
police
If you have been involved in an accident with a Semi Truck, the first thing you should do is get medical help, even if you feel fine, you could have injuries. Afterwards, call the police. Exchange information with the other drivers involved in the accident. Get their license numbers and insurance information.
Most people live their lives without being questioned by the police. If you have been involved with a suspicious activity, witnessed a suspicious activity, have been involved in an accident, or had another type of incident that the police could be involved in, then you are much more likely to be questioned.