What is the main factor determining whether a contractor should use thermoplastic material or waterborne paint for highway striping?

1. Thermoplastic is only allowed on private residential driveways.
2. Paint has a higher initial cost but lasts twice as long as thermoplastic.
3. Thermoplastic requires no specialized heating equipment for site application whatsoever.
4. Thermoplastic offers much longer durability and retroreflectivity on high-volume roads.