Railway Bridge Lab

Build bridges with just 20 parts, then send cars, trucks or trains across.

Take on 70 bridge challenges in seven colorful regions. Snap roads and steel supports onto the grid, form strong triangles, and watch stress colors and failures during vehicle tests. Earn stars for safe, efficient bridges and save your designs on this device. All levels are available from the level picker.

Includes the original railway sandbox, three train loads, undo and starter trusses. Click two points to build; 1/2/3 select road, steel or erase; Z undoes; Space tests or returns to building. Single player, with simplified structural physics.