Suppose a driver is following a vehicle closely (about 1 second distance), and the front vehicle is travelling below the municipal speed limit, suppose at ~40~35km/h, all happening on a quiet 10:30pm on an August' Sunday, with the road being dry and well lit, and not a single other moving vehicle in a 300 meters radius, when the driver of the lead vehicle suddenly comes to a full sudden stop in the middle of the road, causing the