It is sad to hear that they are injured crossing the roads. I could only wish to see that many here. They are likely looking for water or a mate.

Sometimes putting in a small pond will help to keep them near. If this is something you'd like to do, place it as far away from the road as possible to divert the frogs and toads in the other direction. This will, however, keep them coming to visit you, so if they are a nuisance to you, I would then not recommend this.

Toads will like a very shallow end with pond plants to lay eggs in. Frogs will like a deeper end to dive down into and to also lay eggs in. When initially filling the pond, use dechlorinator in the water if you have city water. After that, the rain should take over. Chlorine in city water is toxic to amphibians. Clean well water is fine.

The injured toad....can you take a picture of him?