4) Yes, there are many limitations and drawbacks in the building of news roads because this will cause a massive use of materials and problems in the transport of them. Moreover, it has an high negative impact in the environment.
6) In our opinion the government policies and the public education play a very important role in this discussion and problem because the main point of their work is teach the different rules and preventions to take in this cases, also they have to take charge in the compliance and resolution of the different indications or issues in the roads.