nowtheamericanautomobileassociationfoundationfortrafficsafetyinwashingtond.c.isplanningtorepeatjapanssuccess.startingnextyear,thefoundationwillpaintcheveronsandotherpatternsofstripsonselectedroadsaroundthecountrytotesthowwellthepatternsreducehighwaycrashes.
excessivespeedplaysamajorroleinasmuchaonefifthofallfataltrafficaccidents,accordingtothefoundation.tohelpreducethoseaccidents,thefoundation.tohelpreducethoseaccidents,thefoundationwillcarryitstestsinareaswherespeedrelatedhazardsarethegreatestcurves,exitslopes,trafficcircles,andbridges.
somestudiessuggestthatstraight,horizontalbarspaintedacrossroadscaninitiallycuttheaveragespeedofdriversinhalf.however,trafficoftenreturnstofullspeedwithinmonthsasdriversbeeusedtoseeingthepaintedbars.
cheverons,scientistssay,notonlygivedriverstheimpressionthattheyaredrivingfasterthantheyreallyare,butalsomakealaneappeartobenarrower.theresultisalongerlastingreductioninhighwayspeedandthenumberoftrafficaccidents.
thepassagemainlydiscusses________.
aanewwayofhighwayspeedcontrol
banewpatternforpaintinghighways
canewwaytotrainingdrivers
danewtypeofopticalillusion
