Chapter 4 — Your Driving 55 TIP Single-Point  Interchange In intersections without traffic signs or signals, the right- of-way rules state: Right-of-Way at Intersections When exiting a private driveway, stop and yield to all other vehicles and  pedestrians. At unmarked intersections where it is hard to see in all directions,  stop and then move forward slowly and cautiously. Drive with caution at intersections with traffic signals and wait until the signal  permits you to turn or to move straight ahead. When you approach an intersection with a stop sign, you must come to a  complete stop and yield to the traffic on the through-street. Do not move ahead  or turn until you can proceed safely. When two facing vehicles approach an intersection at the same time, the right- of-way rules are not much help. Both drivers can move straight ahead or turn  right. If one driver is going straight while the other wants to turn left, the driver  who wants to turn must wait. The driver who wants to turn left must give the  proper signal and wait until the turn can be made safely. Therefore, in this case,  the driver who is traveling straight ahead has the right of way. Never change  lanes while you are moving straight ahead through an intersection. A single-point  interchange  compresses two  intersections into a  single intersection  over or under a  free-flowing road.  Through traffic  and traffic turning  left onto or off  the interchange,  is controlled by  a single set of  traffic signals.  The traffic signals  are located at the  center or top of  the interchange  and allow vehicles  to clear the  intersection more  quickly. These  interchanges  help move large  volumes of traffic  through limited  amounts of  space safely and  efficiently. Crashes occur most frequently at intersections, and they are  considered the most dangerous places on a street or highway.  More than one-third of fatal traffic crashes involving motor  vehicles occur at intersections.  On four-lane highways separated by a median of more than  30 feet, each crossing constitutes a separate intersection.  The law requires that you slow down when you come to an  intersection, even if you have the right of way.  • The vehicle already in the intersection has the right of way  ahead of any vehicle that has not yet entered; • When two or more vehicles reach an intersection at the  same time, the vehicle to the right has the right of way; • A vehicle with the right-of-way may move straight ahead or,  if legal and after signaling, turn right or left; and • Even with the right-of-way, be careful to avoid hitting other  vehicles and pedestrians. 