The safest alternative would be to change the infrastructure. Milling magnetic strips into the road in which the vehicle can log in via an app. Here, the vehicle is connected to the road via magnetism. Vulnerability would be very low and the number of very vulnerable sensors and cameras would be greatly reduced.
@Tenbagger2024 I don't think that will work in the foreseeable future. Who is going to finance it and where are the resources going to come from? Germany can't even keep up with the renovation of existing highways and bridges