1998 GMC Suburban Owner's Manual - Page 226

Freeway Driving The most important advice on freeway driving is: Keep L ~ Iwith traffic and keep to the right. Drive a t the same speed most of the other drivers are driving. Too-fdst 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 the freeway. If you have a clear view of the freeway as you drive along the entrance ramp, you should begin to check traffic. Try to determine where you expect t o blend with the flow. Try t o merge into the gap at close to the prevailing speed. Switch on y o ~ turn signal, check ~r your mirrors and glance over your shoulder as often as necessary. Try to blend smoothly with the traffic flow. Once you are 011 the freeway, adjust your speed to the posted l i m i t or t o the prevailing rate if it's slower. Stay in the right lane unless YOLI want to pass. Before changing lanes, check your mirrors. Then use Mile for mile, freeways (also called thruways, parkways, expressways, turnpikes or superhighways) are the safest of all roads. But they have their own special rules. Just before you leave the lane, glance quickly over your shoulder to nlake sure there isn't another vehicle i n your "blind" spot. Once you are moving on the freeway, make certain you allow a reasonable lollowing distance. Expect t o move slightly slower a t night. 4-34