Algodoo

this is the same route as before, just a different method of intersection traversal.

the intersections operate automatically on approach, and lights will protect an intersection from being traversed by another cart if it is already in use. I found that can cause the carts to bunch up together, and cause a cart to block an intersection if another cart leaves it. so at various points I have metering lights that are only yellow or red (never green), that prevents intersection congestion

left arrow - red direction
right arrow- green direction

the intersection interlocks and lights operate automatically when the vehicle approaches