I ride over a certain stretch of road often and have been trying to create routes that use this same stretch of road, but the Strava route builder will detour me tens and thousands of climbing feet out of the way.  The problem is that the road source used in the route map has a stretch of road incorrectly identified as motorway.  What is the best way to fix this?

Here's a bit of context.  The road is Pacific Coast Highway in California just south of Las Posas.  This is about 40 miles WNW of Santa Monica.  Pacific Coast Highway is a main cycling thoroughfare connecting the Los Angeles area to Oxnard/Ventura.  Just south of Las Posas the road splits into two travel directions with a pronounced divider.  It looks like a motorway, but the speeds are still 55 mph.  The first offramp is Las Posas and cyclists exit here to continue north.  Because OSM had a short section of PCH labeled as a motorway cyclists were routed through the Santa Monica mountains.

I have done two things on OSM.  I changed the road type of PCH leading to Las Posas from Motorway to Trunk Road.  I believe that change should fix the routing issue.  I also mirrored the shoulder cycle route on 101 at Bates road by creating a shoulder cycle path through the section of PCH that had formerly been classified as motorway.  This is a belt and suspenders approach.  Which method is better going forward?

How long doe sit typically take for a change in OSM to propagate to Strava routes?