As they got closer to Titan City, the number of pedestrians and vehicles on the highway increased.
In the New World, fuel was very expensive, so most vehicles on the road were electric, and cars were a rare sight. There were more pedestrians and bicycles. The rest were domesticated beasts, either pulling carts or being ridden.
As long as they weren't aggressive, beast tamers would find ways to tame them and sell them.
Mutated beasts brought not only danger but also began to infiltrate human civilization, existing in society in their unique way.