Easy to build track system?
 

What is the name of that company that sells the track systems made out of domed plastic and that interlocks with each other?

Road Dome

roaddome.com

You mean that movable on road jump system ?;)

No. Road dome is it. Thanks.

Yeah Tim....onroad jump system...LOL

Would highly not recommend road dome. It serves zero value. As mentioned above, the cars only "jump" the obstacles. You are better to build a wooden barrier system lined with foam/plastic.
This is from a track owners perspective.

It depends who you ask and what your needs are.If you have room to store track barriers and wood planks then go with the wooden barriers.If your limited to storage space you can't beat the roadrail system.Very portable and it does whats its suppose to do.Outline a track.If people complain the are always launching cars off this system then maybe they need to look at thier driving.You should not be anywhere near the boards.

I honestly like Roadrail a lot....No damage to my car and don't have to wait for a marshall to get my car (which took anywhere from 1/2 a lap to a full lap & a half last Saturday)

If your track has problems with people cutting the track and getting off with it then theres a serious problem there and its not nescesarily the track system