I have the need for a stopper for my teenage driver so as to avoid costly damage to the house which would inevitably be incurred without one.

The stopper is much like you see in parking lots to stop cars from obstructing walkways, and from rolling into traffic.

The idea came when my child enrolled in Driver's Ed. We were not only going to need another car, but also somewhere to park said vehicle. My driveway is only single width, but the Garage is a double, so it is wider by the garage, giving me the perfect place to put a parking space.

This could be used in a garage to avoid hitting the back wall, or anywhere you would like a vehicle to stop to avoid damage.

Supplies

3" PVC pipe, length is not too important as this could be pieced together. ( I used a length of 5'10")

Concrete mix

Concrete Caulk

Duct

Tape measure

Saw

Step 1: Cut the Pipe

Cut the PVC pipe in half lengthways. I used a table saw, but a cutoff wheel on an angle grinder, or rotary tool would do the trick. The pipe needn't be pressure rated for this project, so if yours is soft enough, a simple hand saw would be just as quick. Even though I used a table saw, mine came out a little twisted, but I wasn't concerned because I needn't be the full 1.5" of the half-pipe.

If you used a shorter piece of pipe, you really only need to put it where the tires will hit, so you could just use the pieces for in front of the tires.

I went with what I had, and made it wide enough to reach both tires because I'm not sure of my own offspring's skills with backing in.

Attach the pipe halves together along their length to stop them from rolling while they cure/set.

Cap the ends of the pipe flush with duct tape leaving you with a double trough.

Mix the concrete per the instructions on the packaging. I used a 5-gallon bucket, and mixed it a little wet because this was left over from a driveway patch I'd done a few weeks back. Typically you would want something a little smoother than what I used.

Pour the concrete mix into the troughs, and leave them on a level surface to cure. Depending on the mix that you use, curing times will differ, but I gave mine 3 days. I made two, and so I filled both troughs, but if you're only doing one full length stopper, you'll only need to fill one half.

Step 2: Measure and Mark

I had painted lines on the ground where the car will go in order to truly create a parking space.

I pulled the car to the end of the line, and measured from where the tire touches the ground to the end of the back bumper as the rear end is longer from the wheel than the front is.

I used a scrap of wood, and placed it where it would need to go to be sure that the car would fit.

I then left the wood scrap in place for a few days while the pipes finished curing (and for the rain to stop).

Separate the pipes.

There is a step where the car would need to stop for my situation, so I took the measurement from the tire, and placed the now cured pipe down, pipe-side down, and then roll it over into place before separating the PVC from the concrete.

Step 3: Address Any Cracks

If you made this stopper full length as I did, then you're likely to have broken the stopper, likewise if you didn't fill the trough it likely broke when you turned it out.

Neither of these outcomes is a big deal because you have the caulk.

If you have broken the stopper into pieces, you can "Glue" them back together with caulk.

If, like me, you used a mix containing lots of aggregate, then you'll likely have spacing underneath the stopper too, which can also be caulked.

If you want this to be permanent, then it can be caulked to the ground, or staked with concrete screws if you have a hammer-drill, and masonry bits.

Step 4: Start Using the New Parking Space

This is the finished space in my driveway. I put my stopper off-center so that it can be seen from the driver's side more easily, but it is long enough to stop both tires.

These stoppers are only an inch and a half tall, so they're not tall enough to stop you from getting over them if you really wanted to.

So far the house/steps have not been hit, so this project has been very effective.