▁at ▁an ▁un construct ed ▁part ▁of ▁Route ▁ 6 1 ▁west ▁of ▁Em ery ville . ▁The ▁latter ▁end ▁would ▁require ▁an ▁inter change ▁over ▁water . ▁However , ▁local ▁resistance ▁to ▁further ▁fre ew ay ▁construction ▁in ▁Oak land ▁prevent ed ▁the ▁extension . ▁Similar ▁resistance ▁in ▁Ber keley ▁has ▁kept ▁Route ▁ 1 3 ▁from ▁being ▁built ▁as ▁a ▁fre ew ay ▁north ▁of ▁Route ▁ 2 4 , ▁hence ▁its ▁role ▁as ▁a ▁surface ▁street . ▁ ▁In ▁August ▁ 2 0 0 4 , ▁Cal trans ▁began ▁replacing ▁the ▁median ' s ▁original ▁metal ▁guard rails ▁with ▁a ▁new ▁wall ▁along ▁the ▁ ▁stretch ▁of ▁SR ▁▁ 1 3 ▁between ▁SR ▁ 2 4 ▁and ▁I - 5 8 0 . ▁ ▁This ▁allowed ▁road ▁cre ws ▁to ▁drive ▁street - s we eping ▁vehicles ▁along ▁the ▁shoulders ▁throughout ▁the ▁week , ▁rather ▁than ▁sending ▁people ▁to ▁pick ▁up ▁tr ash ▁by ▁hand . ▁ ▁However , ▁residents ▁frequent ing ▁SR ▁ 1 3 ▁have ▁said ▁that ▁the ▁median ▁appears ▁to ▁be ▁filled ▁with ▁fewer ▁trees ▁and ▁bush es ▁than ▁prior ▁to ▁Cal trans ▁construction . ▁These ▁trees ▁once ▁dens ely ▁l ining ▁the ▁median ▁have ▁long ▁supp lement ed ▁the ▁l ush ▁veget ation ▁on ▁both ▁sides ▁of ▁the ▁highway ▁to ▁beaut ify ▁this ▁scen ic ▁route . ▁ ▁Major ▁inter sections ▁ ▁See ▁also ▁ ▁References ▁ ▁External ▁links ▁ ▁California ▁@ ▁A AR o ads . com ▁– ▁State ▁Route ▁ 1 3 ▁Cal trans