A HUGE THANK YOU to Tom Button for uploading these powerful applets to help students conceptually and meaningfully better grasp the concept of interpreting graph models!
These traffic simulations originally featured in the DfE Standards Unit resource: Interpreting Distance-Time Graphs with a Computer. They were designed so that students could interpret linear and non-linear distance-time graphs.
These are the original 20 simulations that featured in the Java program Traffic (rewritten in GeoGebra).
The notes and guidance for teachers can be found at: https://www.stem.org.uk/rxucg.