this game allows you to create your own track and road layout, then watch a train and car run around it. choose the track or road piece with the mouse, and position it with the arrow keys. have fun! (Don't put two curves next to each other, as the train or car won't be able to get round them, and it will crash.) (When you click green flag, any existing layout will be deleted. To avoid this, hold C when you press it.)
This was based on quite a few projects I liked. It was made on scratch 1.4 and uploaded, so I can't remember who to thank for it. Sorry. If it is you, Thanks.