If your home is located near the start of a secondary road, then you might find that drivers are using it as a turnaround to reverse direction on the main road. Rather than travel the distance required for an authorized exit and reverse course, many people take the first available egress point, then make a u-turn at the first available spot. If this happens to be your driveway, then you know how bothersome it can be. You shouldn't have to park your car at the foot of your driveway to block unwanted cars and be forced to walk up to your front door. What you should do is install a gate that will deter this behavior and save your driveway from unnecessary wear and tear.
Here are two methods to consider.
Vinyl Picket Fence With Cantilevered Sliding Gate
If you don't currently have a fence on the front of your property, then you might want to consider installing a long vinyl picket fence. These are nice looking and also serve the purpose of deterring people and cars from entering your property. In order for you to be able to drive in and out of your driveway, you should have a cantilevered sliding gate installed that spans the width of the driveway. The gate can be controlled with remote control so that you don't have to step out of your car to open it. You can get the gate painted to match the color of your picket fence. You can even have the sliding gate match the picket design of your fence so that it blends in seamlessly.
Vinyl looks nice and is very low maintenance. The reason you should choose a cantilevered sliding gate as opposed to another type (v-channel, for instance) is that the cantilevered gates are suspended above the ground. This means they won't get mucked up with mud or freeze during a heavy snow like other sliding gates will.
Iron Fencing With Farm Gate
If you're looking for something more substantial, ornate and heavy duty, then consider an iron fence and farm gate combo. With an iron fence you have the luxury of picking the design you want. You can have a picket style, a post-and-chain style, or a railing style with decorate fleur de lis adornments. The fence should run the length of your property and bookend your driveway. The opening of the driveway should have a large farm gate. These swing open, as opposed to sliding gates, so you need to make sure you have road clearance if you want them to open towards the road. It's best to also post a sign on the outside of the fence so that people won't stop and try and open it. The sing can say that the fence is locked and it is private property, no U-turns allowed.