1993 GMC Safari Owner's Manual - Page 185

thatyoucanseeonlyafewfeet(meters)ahead. It maycomesuddenly an otherwiseclearroad.And it canbeamajorhazard. to Whenyoudrive into afogpatch,yourvisibilitywillbereducedquickly.The biggestdangersarestrikingthevehicleaheadorbeingstruck by the one the road.Ifthevehicleahead behind. Try to"read"thefogdensitydown starts to become less clear or, at night, if thetaillightsareharder to see,the fog is probablythickening.Slowdowntogivetrafficbehindyouachance to slowdown.Everybodythenhasabetterchance to avoid hittingthevehicle ahead. A patch of densefogmayextendonlyforafewfeet(meters)orformiles (kilometers);youcan'treallytellwhileyou're in it. You canonlytreat situationwithextremecare. the Onecommonfogcondition-sometimescalledmistorgroundfog-can in theearly happen in weatherthatseemsperfect,especiallyatnightor morning in valleyand low,marshyareas.You canbesuddenlyenveloped in thick,wethaze that mayevencoatyourwindshield. You can often spotthese fogpatchesormistlayerswithyourheadlights.Butsometimestheycanbe waitingforyouasyoucomeovera hill or dipintoashallowvalley.Start yourwindshieldwipersandwasher,tohelpclearaccumulated road dirt.Slow downcarefully. Tips on Driving in Fog Ifyougetcaught in fog,turnyourheadlightsonlowbeam,evenindaytime. You'llsee-and be seen-better.Useyour foglights if yourvehiclehasthem. Don'tuseyour high beams.Thelightwillbounceoff makeup fog andreflectback at you. the waterdropletsthat Useyourdefogger. In high humidity,evenalightbuildup of moistureonthe inside of theglasswill cut downonyouralreadylimitedvisibility.Runyour windshieldwipersandwasheroccasionally.Moisturecan build uponthe outsideglass,andwhatseems to befogmayactuallybemoistureonthe outside of your windshield. Treatdense fog as anemergency.Try to find a place to pull off theroad. Of courseyouwant to respect another's property,butyoumightneed to put somethingbetweenyouandmovingvehicles-space,trees,telephonepoles, a private driveway,anythingthatremovesyoufromothertraffic. If visibility is nearzeroandyoumuststop but are unsurewhetheryou awayfrom the road,turnyourlightson,startyourhazardwarningflashers, andsoundyourhornatintervalsorwhenyouhearapproachingtraffic. are 4-29