Lego Cars vs Crash Barriers...

This is a Lego city, and this is a Lego car one second away from dropping down this ramp and destroying everything and everyone. Okay, well maybe that one won't, but there's four more cars that get bigger and bigger, so let's stop them. I built this road section to slide out so that I can modify it by adding different gates and crash barriers, and first is a drop arm. It's just like a railway crossing, but this one's actually designed to take force rather than just telling drivers to stop. But it's too flimsy, so at the other side I added this block of bricks to secure it when it's in the down position. So we can put it back in place and then test it first against the smallest car. It survived that, so now the second. Yeah, it didn't stand a chance. So next I'm going to try building a pivot gate, which is essentially the same thing, but instead of this one beam across, it's an entire gate, which I'm hoping increases the surface area in order to stop more cars. I can use the same worm gear mechanism, but because of all this added weight, it no longer holds in place, so I stabilized it with some more technique beams. Nice, that's much better. So I'll once again put it back in place and let's test the first car to see if it's any stronger. Yeah, I don't think the problem is the size of the gate, but it's the connection to the actual road. So for the next one, I'm going underground. Using this 32 stud long axle, I was able to build up a support beam that runs all the way down to the bottom of the base. Then on the inside, I started by building a column with another axle connected to the front of it with two gears. To maximize strength, I also connected it to the main support at two different points, which should mean that it isn't going anywhere. But unfortunately, even though it's super sturdy, these support beams aren't. So I switched them out for an entire box built of interlocked bricks. And now that I've got the design, I can duplicate it three more times to put on each corner. Then two of the sides can have these bevel gears connected up to a motor that will drive the axle. And then most importantly, I built two of these gates, which have gear rags that slide into the gears that are turning, which lets it open and close. In the middle, I also connected beams to hold it in place. And on the side, I added more beams to make sure everything's locked in place, even when the gates are tracted. And now it's once again time to see how it does. I'm a little skeptical because I think the gates are just going to rip out. But there is still the beams connecting everything through the road and onto the ground, which is going to make it really strong. Absolutely no problem against the first car. And it seemed to do just fine against the second. Yeah, it didn't quite spring back into place like the first two with this one, but it's still holding strong. And finally, we have the biggest car, which I honestly don't think it stands a chance against. And wow, I was definitely wrong, but I think we can still do better because it was almost through the gate. For the next build, I'm using these four linear actuators all driven by one motor to make a raising wedge, which is basically a chunk of the ground that's going to lift up and down to stop the cars. So I clipped in this chunk of bricks to the actuators, then attached the road plate on top, and then I can use these axles at the back to create the pivot point. Then when I drive the actuators, it lifts up and creates a very strong, very flat surface for the cars to get destroyed when they run into. And I do think it's going to be pretty strong because all of the pressure that goes here is going to run down and then into all of these road plates, which are secured really firmly, but we'll see. The first two it did totally fine, but the third one... Safe to say that is not ideal. But I have an idea to make it work way better. So I took it back to the building station, peeled off the base plates from underneath it, then stabilized the front of the wedge by building in a ton of bricks and plates connected up to the back section where it's not taking any of the direct force. So once again, let's see how it does. Alright, take number two. Now that is a lot better. It just bounced straight off. I have a very hard time aiming the GT, but as you can see, that barrier is not going anywhere. It did break it a little bit, but that is definitely a win for the barrier. Which means it's time to bring in a new challenger, this massive Lamborghini Sian. To be honest, I think this barrier's cooked. Needless to say, my assumption was very correct. So next, I'm taking a very different approach and using these pneumatic pistons to try and make working ballers that can race up and down out of the ground and hopefully stop the car. I can add these round bricks on top for the ballard, but it's way too flimsy as it is. That's because the piston on one side might extend or retract faster than the other. So I built these support beams to stop it from tipping one way or the other. Okay, nice. And now that I have all three built, I can use this hand pump to pump up the pistons, which will lift the ballers out of the ground. Then changing this valve diverts the airflow and pushes the ballers back into the ground, but I don't want it to be manual. So using these two motors, I built an automatic pump that gets double the airflow. But the switch to lift and lower the ballards is still automatic. So using this slip gear, I motorized the turning of the switch. But there's too much torque to turn it, so the slip gear actually just rotates on its own. So I switched it for a normal gear and that works way better. Now when I turn the motor using a controller, I can switch between opening the pistons and raising the ballards or switching the direction of the air and closing the ballards. So I can put everything back in the build and cover it with some plates on top. This is honestly so satisfying. I can open the valve and the pistons will raise the ballards out of the ground in the perfectly safe holes, which just looks so cool. Then switching the valve retracts them back into the ground, which honestly might be even more satisfying with the way that they land flush to the floor. So once again, I'll slide it back into place and raise the barrier. They seem pretty sturdy, but I don't know how this is gonna go. Well, so far so good. The third car just straight up bounced off of it. But the Ford GT actually went through one of the ballards. But I had a feeling they were stronger, so I tried it on the other two and it survived both easily. So I'm gonna say it's an overall win two out of three, which once again leaves us with this massive Lamborghini. Yeah, they did not seem to stand a chance, but compared to the one previous, I think they did a little bit better. But there's still an improvement to be made. So next I'm gonna stop trying and making things pop out of the road and instead just make the whole road pop up itself. So I built this rack and pinion that acts as a leg and will go in one of the corners of the road. Then I duplicated it three more times so that I have one for each corner. Then I put one in each corner and connected it up to this main central hub that will control them so that they can raise up and down. Then I spent way too long trying to figure out how to create the controls, but eventually I got it figured out, I think. So I slid it back into place. Okay, I really have my doubts as to whether this will actually work, but let's give it a go. For some reason two of the legs wouldn't really go up, but I figured there was enough of an edge on it that I could reasonably still test it against the cars. Well, sort of. Let's try it. Not a problem. I don't even think it moved for that one. Okay, this is actually starting to look promising. So now we have our fairly battered and bruised Ford GT. I think we have a chance of stopping the Lamborghini. Three, two, one. Well, everything's broken, but the city is safe. Also, it pushed everything on my desk and just spilled all of those Lego pieces. So I better end this video. If you're gonna like this video, click on it right here. Bye.