Updated FHWA Interstate Route Log As Of Dec. 31, 2015

[theline]

While considering major cities served by interstates, we should add Evansville to the list of those served by I-69 in Indiana. The table lists cities as small as Gas City and Washington among those served, but omits E-ville. I suppose it was left off when I-69 stopped at I-64, but that's no longer the case.

[noelbotevera]

I-41's concurrency mileage does not reflect the concurrency along US 41.

[Kacie Jane]

It shouldn't. It only lists overlaps with other interstates.

[kendancy66]

The mileage for California's I-210 decreased, likely reflecting the portion that is now CA 57 south to the Kellogg Interchange.

I wonder if they will ever extend I-210 along CA-210. I've seen it suggested elsewhere, can't remember where though.

If you go by the new BGS  that is on I-10 West just east (1-2 miles) of the I-210 (CA-210) exit then the whole thing is already I-210

[mvak36]

This one?

https://goo.gl/maps/j5qR4HvTkW12

[andy3175]

The Route Log lists I-80 in California as 199 miles, but it's actually closer to 205 miles long. Perhaps the section in City/County of San Francisco remains omitted? But "San Francisco" itself remains listed in the log, and the portion of I-80 between the Bay Bridge and US 101 was recently upgraded substantially and improved.

The San Francisco Skyway west of 480 was removed from the official Interstate system 1968 IIRC (and I recall it was part of California trying to get more chargeable mileage for the Century Freeway/105)  Having said that, I would say 95% of the improvements have taken place from 5th Street eastward at most (along the old US 40/50 ramps that are the original west terminus of the Bay Bridge) along where the old 480 junction used to be; the section of freeway between 101 and 5th is pretty unchanged from its 1950s origins and I don't think has ever been widened or realigned.

Is the San Francisco Skyway 6 miles long? I'm trying to understand how I-80 is 205 miles, yet the route log lists only 199. Your explanation may account for two or three miles, not the full six differential. Perhaps this has something to do with I-80's realignment many years ago in Sacramento as well?

[andy3175]

The Route Log lists I-80 in California as 199 miles, but it's actually closer to 205 miles long. Perhaps the section in City/County of San Francisco remains omitted? But "San Francisco" itself remains listed in the log, and the portion of I-80 between the Bay Bridge and US 101 was recently upgraded substantially and improved.

As far as FHWA is concerned, I-80 ends at the west end of the Bay Bridge.  The early 1950s proposal was for a western extension of I-80 to the Central Freeway, then west along the Fell/Oak panhandle of Golden Gate Park, then ending at an interchange with the Park Presidio Freeway which would have replaced Park Presidio Boulevard.  That proposal is what California mileage is based on, although not the exit numbers.

Hm, Google Maps shows 203 miles from the 101/80 split at the Central Freeway east to the Nevada border - which is pretty close to the California mileage listed above, without having to include the unbuilt Western Freeway (or the existing Central Freeway segment that was I-80/US 101 from the late 1950s to 1968).

I looked at this too and arrived at a bit more, closer to 205. Wikipedia lists 205.07 (https://en.wikipedia.org/wiki/Interstate_80_in_California), which references CalNexus (http://www.dot.ca.gov/hq/traffops/engineering/calnexus/pdf/80.pdf).

[Thunderbyrd316]

   So what is the total current official mileage of the Interstate system? I did not see it listed but admittedly I did not have time to read the entire thing.

[Bickendan]

I find it interesting that I-35W and 35E are labeled as such, but I-69W, 69C and 69E are labeled 69 West, 69 Central and 69 East.

[lordsutch]

I find it interesting that I-35W and 35E are labeled as such, but I-69W, 69C and 69E are labeled 69 West, 69 Central and 69 East.

Technically that's what they're called by the TxDOT Minute Order and ISTEA Section 1105, as amended.

[TheStranger]

Is the San Francisco Skyway 6 miles long? I'm trying to understand how I-80 is 205 miles, yet the route log lists only 199. Your explanation may account for two or three miles, not the full six differential. Perhaps this has something to do with I-80's realignment many years ago in Sacramento as well?

Saw your followup post.  To clarify what the Skyway is...it's 80 between US 101 and the old 480 junction (today's Fremont Street exit westbound) which was built as US 40 and US 50 in the early 1950s.

Google Maps shows a 1.6 mile length for that segment, from the 101/80 split northbound at the Central Freeway to the beginning of the double-decker portion of the Bay Bridge.

So now I do wonder if the 80 realignment through Sacramento affected the calculations somewhere.

[noelbotevera]

Is the San Francisco Skyway 6 miles long? I'm trying to understand how I-80 is 205 miles, yet the route log lists only 199. Your explanation may account for two or three miles, not the full six differential. Perhaps this has something to do with I-80's realignment many years ago in Sacramento as well?

Saw your followup post.  To clarify what the Skyway is...it's 80 between US 101 and the old 480 junction (today's Fremont Street exit westbound) which was built as US 40 and US 50 in the early 1950s.

Google Maps shows a 1.6 mile length for that segment, from the 101/80 split northbound at the Central Freeway to the beginning of the double-decker portion of the Bay Bridge.

So now I do wonder if the 80 realignment through Sacramento affected the calculations somewhere.

The Goog calls it 18.5 miles from the ends of I-80 business. There seems to be more here.

[kkt]

Is the San Francisco Skyway 6 miles long? I'm trying to understand how I-80 is 205 miles, yet the route log lists only 199. Your explanation may account for two or three miles, not the full six differential. Perhaps this has something to do with I-80's realignment many years ago in Sacramento as well?

Saw your followup post.  To clarify what the Skyway is...it's 80 between US 101 and the old 480 junction (today's Fremont Street exit westbound) which was built as US 40 and US 50 in the early 1950s.

Google Maps shows a 1.6 mile length for that segment, from the 101/80 split northbound at the Central Freeway to the beginning of the double-decker portion of the Bay Bridge.

So now I do wonder if the 80 realignment through Sacramento affected the calculations somewhere.

The Goog calls it 18.5 miles from the ends of I-80 business. There seems to be more here.

Park-Presidio Blvd. and Fulton St. (the north edge of Golden Gate Park) to I-80 and Fremont St. is 5.6 miles according to Google Maps, via Fell St. and 101.

[JCinSummerfield]

And if Ann Arbor & Detroit proper can be served by I-275, shouldn't I-80 & I-90, I-475 (OH) & I-280 be considered as serving Monroe, MI?

No.

The definition of an anal roadgeek: someone who doesn't think I-275 can serve Detroit unless I-80/90 serves Monroe.

Has anybody ever told you your mouth needs a tether?  If I had to lay money down, I'd bet there would be plenty that have.