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[cahwyguy]

Just an odd thought: Perhaps the control cities for I-605 should be "I-210" NB (or "To 210"), and "I-405" SB. It does make me wonder: What is the control city where I-70 deadends into I-15 in Utah, as it is the middle of nowhere.

[TheStranger]

Just an odd thought: Perhaps the control cities for I-605 should be "I-210" NB (or "To 210"), and "I-405" SB. It does make me wonder: What is the control city where I-70 deadends into I-15 in Utah, as it is the middle of nowhere.

Looking at the US 89/I-70 trumpet, the destinations listed:

https://www.google.com/maps/@38.5941627,-112.2547204,3a,16.9y,54.94h,88.18t/data=!3m6!1e1!3m4!1sQSv90aTogbCrEyq7qXu3xQ!2e0!7i16384!8i8192

West: "I-70 to I-15"
East: "I-70 Richfield/Salina"

[bing101]

Here is another one CA-91 West Artesia Freeway gets "Thru Traffic" Yet when the freeway is eastbound it's Riverside. The West end is supposed to have Gardena or Hermosa Beach as a control city?
https://en.wikipedia.org/wiki/California_State_Route_91

[skluth]

Just an odd thought: Perhaps the control cities for I-605 should be "I-210" NB (or "To 210"), and "I-405" SB. It does make me wonder: What is the control city where I-70 deadends into I-15 in Utah, as it is the middle of nowhere.

Looking at the US 89/I-70 trumpet, the destinations listed:

https://www.google.com/maps/@38.5941627,-112.2547204,3a,16.9y,54.94h,88.18t/data=!3m6!1e1!3m4!1sQSv90aTogbCrEyq7qXu3xQ!2e0!7i16384!8i8192

West: "I-70 to I-15"
East: "I-70 Richfield/Salina"

The destination city at this I-70 entrance ramp in Joseph uses Las Vegas.

[RZF]

Here's my two cents, since we're all putting in our input:
I-605 is the SGV's primary singular route to Long Beach now that I-710 will not be constructed in its entire intended form. Sure, it skirts around the east end of Long Beach, but that's why CA-22 and I-405 can get motorists into the central and western parts of the city. So:

SB control city (entirety): Long Beach

Going northbound, just as CA-91 uses "Beach Cities" as one of its control cities in the IE, I-605 should use "San Gabriel Valley" all the way to its interchange with I-10. Then, since the rest of the route does not run through any real populated areas until its northern terminus, from I-10 to I-210, the northbound control should just be "to I-210"

NB control city (I-405 to I-10): San Gabriel Valley
NB control city (I-10 to I-210): To I-210

[AndyMax25]

D7 still refers to this 1982 map, with reference to 1964, when working on sign projects in 2020’s. Go figure.

[TheStranger]

ONE thing that this map shows  that was not implemented: full usage of Sacramento as 101's northbound control city along the Hollywood Freeway.  (This seems to only have been implemented on one ramp sign ever)

The map's actual age can be ascertained by what desginations are shown: I-110 is present (established ca. 1981) but not I-710 (established 1984).  Interesting that 105 is shown to the Long Beach Freeway, but not to its eventual terminus at I-605.

Map also shows 91's lack of control cities west of the Orange/LA county line.

[bing101]

ONE thing that this map shows  that was not implemented: full usage of Sacramento as 101's northbound control city along the Hollywood Freeway.  (This seems to only have been implemented on one ramp sign ever)

The map's actual age can be ascertained by what desginations are shown: I-110 is present (established ca. 1981) but not I-710 (established 1984).  Interesting that 105 is shown to the Long Beach Freeway, but not to its eventual terminus at I-605.

Map also shows 91's lack of control cities west of the Orange/LA county line.

Yes I remember prior to 1982 the control cities heading north via Ridge Route had a control city of Bakersfield prior to the Boat section of I-5 being completed.