▁backing ▁up ▁onto ▁SR ▁ 1 3 ▁north bound ▁via ▁the ▁exchange ▁between ▁the ▁high ways . ▁▁▁ ▁After ▁going ▁through ▁an ▁inter change ▁with ▁State ▁Route ▁ 2 4 ▁( up grad ed ▁August ▁ 1 9 9 9 ) ▁near ▁the ▁entrance ▁to ▁the ▁Cal dec ott ▁T unnel , ▁however , ▁SR ▁ 1 3 ▁takes ▁dr astic ▁changes ▁in ▁its ▁quality ▁and ▁capacity . ▁The ▁fre ew ay ▁ends ▁at ▁an ▁u ph ill ▁j unction ▁and ▁the ▁route ▁is ▁default ed ▁onto ▁T unnel ▁Road , ▁a ▁much ▁more ▁narrow ▁two - lane ▁road ▁that ▁b ends ▁to ▁the ▁west ▁and ▁wind s ▁down hill . ▁Upon ▁reaching ▁the ▁foot ▁of ▁the ▁hill , ▁T unnel ▁Road ▁becomes ▁Ash by ▁Avenue , ▁a ▁marked ly ▁urban ▁( and ▁very ▁busy ) ▁two - lane ▁street ▁with ▁an ▁east – west ▁routing . ▁Enter ing ▁Ber keley , ▁U C ▁Ber keley ▁is ▁north ▁on ▁Te legraph ▁Avenue , ▁while ▁Ash by ▁B ART ▁station ▁is ▁located ▁at ▁Ad eline ▁Street . ▁Past ▁San ▁Pablo ▁Avenue ▁( SR ▁ 1 2 3 ), ▁Route ▁ 1 3 ▁( as ▁Ash by ▁Avenue ) ▁runs ▁through ▁a ▁more ▁mod est ▁neighborhood ▁before ▁reaching ▁its ▁current ▁end ▁at ▁Inter state ▁ 8 0 / Inter state ▁ 5 8 0 . ▁ ▁SR ▁ 1 3 ▁is ▁part ▁of ▁the ▁California ▁Fre ew ay ▁and ▁Express way ▁System , ▁and ▁is ▁part ▁of ▁the ▁National ▁Highway ▁System , ▁a ▁network ▁of