Freeway DrivingMile for mile, freeways — also called thruways, parkways,expressways, turnpikes, or superhighways — are thesafest of all roads. But they have their own special rules.The most important advice on freeway driving is: Keepup with traffic and keep to the right. Drive at thesame speed most of the other drivers are driving.Too-fast or too-slow driving breaks a smooth traffic flow.Treat the left lane on a freeway as a passing lane.At the entrance, there is usually a ramp that leads to thefreeway. If you have a clear view of the freeway as youdrive along the entrance ramp, you should begin to checktraffic. Try to determine where you expect to blend withthe flow. Try to merge into the gap at close to theprevailing speed. Switch on your turn signal, check yourmirrors, and glance over your shoulder as often asnecessary. Try to blend smoothly with the traffic flow.Once you are on the freeway, adjust your speed to theposted limit or to the prevailing rate if it is slower.Stay in the right lane unless you want to pass.Before changing lanes, check your mirrors. Then useyour turn signal.Just before you leave the lane, glance quickly over yourshoulder to make sure there is not another vehicle inyour blind spot.Once you are moving on the freeway, make certain youallow a reasonable following distance.4-21