What security measures, for example, apply to vehicle-to-vehicle transfers?

Please help I can't follow through with the final steps

Vehicle-to-vehicle communications may use a variety of security measures.

In the case of vehicular communications or communications between vehicles, what kinds of safety precautions are taken?

How much effort has been made by the federal government of the United States to increase transportation safety via the establishment of programmes, organisations, and laws?

This is a highway design question and the book’s ISBN: 13-978-0-495-43853-3 Please try to answer it

RING 1 RING 2 $1 45 MAJOR STREET $2 $6 BARRIER = Phase Number Protected Movement $3 MINOR STREET $4 = Permitted Movement = Pedestrian Movement BARRIER In this ring and barrier diagram, which pair of phases constitutes a phase pair? phase 1 and phase 2 phase 1 and phase 5 phase 1 and phase 6 O phase 1 and phase 3

I am doing road accident analysis survey. Could you please suggest me what are the best websites to collect data of road accidents which includes reason behind it?

Delay claims fall into which three categories?

expressed a speed decrease of 10 miles per hour as a signed number