TODO for Phase 3 (Simulation)

try to simplify straw_model step (less phases?)
make cars pathfind to their destination
better visualization
- draw moving / blocked colors (gradually more red as they wait longer)
- draw stop buffer in front/behind of cars
- draw cars in intersections, even when slightly zoomed out
- draw cars in slightly different colors, to distinguish them better
start implementing a second AORTAish driving model
reversible sim
model cars parking
- maybe render numbers on the cars to distinguish them
- document the FSM (on lane driving, waiting, turning, parking, etc)
model bikes in driving lanes (as slow cars)
model pedestrians
- also building to sidewalk?