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In article <1166758548.53011@no.spam>, ellis@no.spam () wrote:
> The "rule" normally is that north/south highways get odd
> numbers and east/west highways get even numbers.
> 
> So what's with the 91?

California 91?

*US* 91 used to go north-south. I don't know why *California* 91
doesn't. :)



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In article <1166758548.53011@no.spam>, ellis@no.spam () wrote:

> The "rule" normally is that north/south highways get odd
> numbers and east/west highways get even numbers.
> 
> So what's with the 91?

Same thing that's with the 170, only rotated about 90 degrees.

-- 
Jim Ellwanger <usenet@ellwanger.tv>
<http://www.ellwanger.tv> welcomes you daily.
"The days turn into nights; at night, you hear the trains."

ellis@no.spam wrote:
> The "rule" normally is that north/south highways get odd numbers and east/west
> highways get even numbers.
>
> So what's with the 91?
>
What rule?  Not for CA state highways.  Maybe for US highways and
Interstate highways (but there's a different rule for US and I that are
numbered higher than 101), but not for CA state highways.

And besides, CA-91 inherited its number from US-91 which generally
followed the route of I-15 north of Devore, CA (through Las Vegas and
beyond), but followed the route of I-215 to Riverside, and then the
route of CA-91 before turning south along CA-19 to end at the Long
Beach traffic circle.

Daniel Faigin has a more extensive write-up on CA-91 and US-91 at:
http://www.cahighways.org/089-096.html#091

In article <usenet-074DF8.22083021122006@news.dslextreme.com>,
Jim Ellwanger  <usenet@ellwanger.tv> wrote:

>> The "rule" normally is that north/south highways get odd
>> numbers and east/west highways get even numbers.
>> 
>> So what's with the 91?

>Same thing that's with the 170, only rotated about 90 degrees.

And the 14 (sort of).

In article <1166770175.104295.42910@a3g2000cwd.googlegroups.com>,
 <larry_scholnick@yahoo.com> wrote:

>What rule?  Not for CA state highways.

Actually the great majority of California highways follow that rule.

ellis@no.spam wrote:
> In article <1166770175.104295.42910@a3g2000cwd.googlegroups.com>,
>  <larry_scholnick@yahoo.com> wrote:
>
> >What rule?  Not for CA state highways.
>
> Actually the great majority of California highways follow that rule.

I remember reading that the original incarnation of CA state highways
(probably on Daniel Faigin's site) did have very systematic rules about
the placement of highways.  Odd were north/south, Even were east/west.
There were also rules about the order of the highways:

1 Along Coast in Nor Cal (Cabrillo Hwy, present day 1)
3 Along Coast in So Cal (PCH, present day 1)
5 Next state highway east of 1 in Nor Cal (Skyline Blvd, present day
35)
7 Next state highway east of 3 in So Cal (Sepulveda Blvd [405 Fwy],
extended along present day CA-14 all the way to Bishop)

9 Next state highway east of 5 in Nor Cal (parts of present day 9 in
Santa Cruz area)
11 Next state highway east of 7 in SoCal (Figueroa Street [Harbor Fwy])
13 Next state highway east of 9 in Nor Cal (what's now 13, Warren Fwy)
15 Next state highway east of 11 in So Cal (Atlantic Ave [Long Beach
Fwy])
17 Next state highway east of 13 in Nor Cal (Nimitz Fwy and present day
17)
19 Next state highway east of 15 in So Cal (Lakewood/Rosemead
Boulevards)

etc.

Similar rules existed for the even highways as well

Of course, this highway scheme got changed to account for the expansion
of US highways and the Interstate system.  E.g. When I-5 was
introduced, Skyline had to be renubmered to CA-35 since in CA no two
different highways can have the same number.

CA-91, as others have mentioned, is a remnant of US 91.  US 91 extended
from Long Beach through Las Vegas, Salt Lake City, and reached the
Canadian border in Montana.  It was mainly north-south.  When I-15 was
introduced, the majority of US 91 was decomissioned, except for the
portion between Long Beach and Riverside (along Carson St / Lincoln Ave
- later the designation was placed on the Riverside Fwy).  Since the
route was totally within the state lines, CA decommissioned this
section and made it a state highway, but retained its number.  THe
number was later extedned to Hermosa Beach when the Artesia/Gardena Fwy
was built.