洛杉磯北部的高速公路。

禁行貨車，允許巴士。

很多大城市周圍會有類似給小型車使用的高速公路。

https://en.wikipedia.org/wiki/Arroyo_Seco_Parkway

Despite a quadrupling of traffic volumes, the original roadway north of the Los Angeles River largely remains as it was when it opened in 1940. Trucks and buses were banned in 1943, though the bus restriction has since been dropped; this has kept the freeway in good condition and relatively safe, despite its outdated design.