The Ridge City Highway (Known as Long Course in Ridge Racer and Green Field in Ridge Racer V) is the expansion of Seaside Route 765 and the second most popular circuit. The course just adds an extra little jaunt through the Rock Ridge. The route is the same, after you're through a short canyon you'll pass a gas station and other businesses at the edge of town. This is where Ridge City Highway heads off in a different direction towards the Rock Ridge. After another short canyon bit you'll be on a roadway that runs along the mouth of the North River with a rock wall lining the right side of the road. After a right turn heading inland you'll pass under the large suspension bridge that goes uptown.
Worth noting that, in Ridge Racer V onwards, the "extension" section is wider compared to its original form.