Car starts but after running awhile will stop in the road while driving?

This could be almost anything. Does the engine turn but not start when it stops? If so, can you determine if the engine is getting gas?

If you leave it for a while, does it then start and run for a while? If so, a very common problem is the electronic ignition pickup coil. This is the part that replaced points in the distributor. They develop an open when they get hot and when they cool down the connection is made again. This makes the car run until it gets hot and runs again when it cools down.

The good news is the pick up is not very expensive or difficult to change.

Best of luck, Jim