How to Drive Blog
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You must signal every time you make a turn if there are other users of the road present. And you just answered your own question. Turning into a parking spot is a turn.
No, you cannot detain anyone unless the person had injured or killed somebody. In that case, you will be exercising a citizen’s arrest under the English common law system. Holding someone against their own will constitutes a false imprisonment charge. If safe to do so, you can use your car to block his car from leaving until the police arrive.
Road signs erected on private parking lots to regulate traffic are for courtesy only and have no enforcement power. The exceptions are no parking or fire lane signs, which are regulated under different laws and tickets can still be issued. Stop signs, which are classified as traffic signs, have no enforcement power within the private lots. However, stop s...