▁state ▁border . ▁Because ▁of ▁the ▁lower ▁population ▁of ▁count ies ▁along ▁the ▁state ' s ▁western ▁border ▁with ▁Iowa ▁and ▁Minnesota , ▁it ▁is ▁a ▁mostly ▁rural ▁routing ▁with ▁lower ▁traffic ▁counts ▁than ▁in ▁other ▁parts ▁of ▁the ▁state . ▁W IS   3 5 ▁is ▁also ▁the ▁termin us ▁of ▁ 1 5   d ifferent ▁state , ▁US , ▁and ▁Inter state ▁high ways ▁along ▁its ▁route . ▁ ▁Illinois ▁state ▁line ▁to ▁Pra irie ▁du ▁Ch ien ▁The ▁southern ▁termin us ▁of ▁W IS   3 5 ▁is ▁at ▁the ▁Illinois – W is consin ▁border , ▁ ▁north ▁of ▁East ▁Dub u que , ▁Illinois . ▁It ▁continues ▁on ▁into ▁that ▁state ▁as ▁Illinois ▁Route ▁ 3 5 ▁( IL   3 5 ), ▁which ▁is ▁the ▁short est ▁state ▁highway ▁in ▁Illinois . ▁ ▁From ▁the ▁state ▁line , ▁W IS   3 5 ▁continues ▁north ▁for ▁about ▁a ▁mile ▁( 1 . 6   km ) ▁before ▁intersect ing ▁with ▁W IS   1 1 ▁at ▁Bad ger ▁Road . ▁This ▁section ▁of ▁highway ▁is ▁the ▁only ▁segment ▁of ▁W IS   3 5 ▁between ▁the ▁state ▁line ▁and ▁Pra irie ▁du ▁Ch ien ▁that ▁is ▁not ▁co - signed ▁with ▁at ▁least ▁one ▁other ▁highway . ▁ ▁W IS   3 5 / W IS   1 1 ▁continues ▁to ▁the ▁west ▁to ▁the ▁inter change ▁with ▁U . S . ▁Highway ▁ 6 1 ▁( US   6 1 ) ▁and ▁US   1