state route 171 planned run i-5 near san diego i-805 through switzer canyon. called switzer canyon freeway, , had been suggested consultant john nolen in 1926. designated route 284 in 1959, route renumbered sr 171 in 1964 state highway renumbering. however, community opposed project; have passed through balboa park , have gone through canyons, residential districts, , golf course. sandag endorsed deletion in 1993, , legislature deleted route in 1994.
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