What's wrong with each taking responsibility for their own safety and installing lights on their carts which reflect against the curbs and light up the lanes. These are small lights that wrap around most of the front of the cart and on the sides. If you tend to drive at night or in the rain then you should have the lights.
Regarding walkers..How many walkers actually walk in the rain or at night. Again if you tend to walk at these time then put on well lit clothing and you will be safe. Same with bikers.
