▁State ▁Highway ▁Route ) ▁number ▁in ▁the ▁Stre ets ▁and ▁High ways ▁Code ▁( Se ctions ▁ 3 0 0 - 6 3 5 ). ▁Under ▁the ▁code , ▁the ▁state ▁assign s ▁a ▁unique ▁Route ▁X ▁to ▁each ▁highway , ▁and ▁does ▁not ▁differenti ate ▁between ▁state , ▁US , ▁or ▁Inter state ▁high ways . ▁ ▁List ▁ ▁L ength s ▁for ▁each ▁state ▁route ▁were ▁initially ▁measured ▁as ▁they ▁were ▁during ▁the ▁ 1 9 6 4 ▁state ▁highway ▁ren umber ing ▁( or ▁during ▁the ▁year ▁the ▁route ▁was ▁established , ▁if ▁after ▁ 1 9 6 4 ) ▁based ▁alignment ▁that ▁existed ▁at ▁the ▁time , ▁and ▁do ▁not ▁necessarily ▁reflect ▁the ▁current ▁mile age . ▁Port ions ▁of ▁some ▁routes ▁have ▁been ▁rel in qu ished ▁to ▁or ▁are ▁otherwise ▁maintained ▁by ▁local ▁or ▁other ▁govern ments , ▁and ▁may ▁not ▁be ▁included ▁in ▁the ▁length ▁listed ▁below . ▁Several ▁routes ▁are ▁broken ▁into ▁non - cont igu ous ▁pieces , ▁and ▁their ▁lengths ▁may ▁not ▁reflect ▁the ▁over laps ▁that ▁would ▁be ▁required ▁to ▁make ▁them ▁continuous . ▁Some ▁routes ▁may ▁also ▁have ▁a ▁gap ▁because ▁it ▁is ▁either ▁explicitly ▁defined ▁in ▁the ▁California ▁Stre ets ▁and ▁High ways ▁Code ▁or ▁due ▁to ▁an ▁un construct ed ▁portion , ▁and ▁the ▁listed ▁length ▁may ▁or ▁may ▁not ▁reflect ▁the ▁gap . ▁ ▁If ▁a ▁route ▁was ▁ren umber ed , ▁the ▁old ▁or ▁new ▁number ▁is ▁given ▁in ▁the ▁" notes " ▁column . ▁ ▁Con