Olancha-Cartago 4-Lane Project

[ClassicHasClass]

Can cities use blue pentagons? I don't know if the county would like that since San Diego county uses it for county routes.

[pderocco]

Another decent possibility is blue pentagon 54 (similar to blue pentagon 66 in San Bernardino County).  It denotes a locally maintained route but maintains the same number.  And fortunately, as we know in California there is one number for one road, even if it changes between Interstate, state, US, or local.  (Think of CA-210 and I-210 being one roadway, I envision similar for 54.)

Or CA-59 to CR-J59. Or CA-132 to CR-J132. There are also some occasional spots where a county route is multiplexed with a state route, especially in the Central Valley. But none of those are county route signs placed on local roads. I'm assuming that all that former CA-54 is maintained by El Cajon, since it starts right at the city limits.

[cahwyguy]

Several legal route descriptions in the Streets and Highway Code (not including the section for route 54) call for localities with relinquished mileage to "apply to the department for approval of a business route designation in accordance with Chapter 20, Topic 21, of the Highway Design Manual".

I'm back to working on the highway pages, and found Ch 20 Topic 21, so I thought I would quote it:

(4) Business Routes. A Business Route generally is a local street or road in a city or urban area, designated by the same route number as the through Interstate, U.S., or State highway to which it is connected, with the words "Business Route" attached to the identifying route shields. The Business Route designation provides guidance for the traveling public to leave the main highway at one end of a city or urban area, patronize local businesses, and continue on to rejoin the main route at the opposite end of the city or urban area.

The Transportation System Information Program is responsible for approval of Business Route designations. Applications for Business Route designation and signing must be made by written request from the local government agency to the Chief of the Transportation System Information Program. U.S. and Interstate Business Routes require approval by the AASHTO Executive Committee.

Note that last sentence. This might mean that the designation of BR US 395 would be in some AASHTO minutes. Route 54 wouldn't, as it is state highway, but there would likely be a record in the Route 54 files in Sacramento.