What is the number of this Indianapolis highway?

[usends]

Click here to view a map of the highway in question...
http://tinyurl.com/ylm774e
...it's not US 136, and it's not I-74...  so what is it?
I assume it's a secret number, since how the roads in this area are signed isn't really an issue.

[Alex]

An ITS milepost posted just after the signal with High School Road on westbound attributes I-74 73.6

Not that ITS markers can be completely trusted as ITS markers on Port Road east of IN-265 indicate it as I-265 through to milepost 10.0

[usends]

An ITS milepost posted just after the signal with High School Road on westbound attributes I-74 73.6

So maybe that means it's "I-74 Spur"?

[corco]

Why wouldn't that be US-136? It seems like that's the only way to connect it to I-74/465

[usends]

Why wouldn't that be US-136? It seems like that's the only way to connect it to I-74/465

Oh, so you're suggesting maybe US 136 turns around and heads back west to the interchange... well, I guess that's a possibility, although there is an "End 136" sign posted east of the interchange:
http://usends.com/30-39/136/136.html

[corco]

Gun to my head I'd guess that functionally/officially it's US-136, but to eliminate confusion they put the end sign at Crawfordsville Rd- because then you'd have to sign 136 East going west, plus I-74 and 465 are right there so there's not much point in signing it and could only lead to traveler confusion.

From 74 and 465, it's also signed as 136/Crawfordsville Rd instead of TO 136/Crawfordsville Rd.

[corco]

I guess it could easily be I-74 mainline in Indiana's eyes, too. Since I-74 uses I-465's mileposts on the beltway, it's highly unlikely that they store information in their computer for 74 and 465 along the concurrency, so for them there's no overlap to have I-74 extend beyond I-465 a tiny bit, so it becomes a deal where there's an explicit I-74 MP 73.6 along that spur, and then just an implied one along th e beltway, but for practical purposes nobody cares about the implied one. It doesn't make any sense from a signage standpoint, but from an inventory/maintenance standpoint which I'm sure is what Indiana DOT cares more about, it's totally kosher

My guess would be is that as far as INDOT is concerned it's I-74 Mainline, and as far as the AAHSTO is concerned it's US-136

[usends]

My guess would be is that as far as INDOT is concerned it's I-74 Mainline, and as far as the AAHSTO is concerned it's US-136

AASHTO?  Heh... the route log on their website has the east end of US 136 at US 41 in Veedersburg IN!   
That's why I was curious about INDOT's designation...

[rawmustard]

According to INDOT's Reference Post Manual, the stretch in question is US-136. It might be a little tough to read, but basically, the ramps on the west side of the interchange intersect I-74, while the ones on the east side intersect US-136, which makes the left turn and ends at the bridge over I-465 (I-74 travels over I-465 for 20.23 miles starting at this point).

[usends]

According to INDOT's Reference Post Manual, the stretch in question is US-136.

Interesting... thanks for your research.  And all this time, I thought US 136 ended where the "End" sign is posted... silly me.  But apparently it goes like this:
http://tinyurl.com/yca8thv

[tdindy88]

Whatever it is, the problem should be eliminated within a few years when that intersection is redone. By the time the construction is finished, I-465 will have ramps lead directly into I-74 West and Crawfordsville Rd. will be reconfigured so that it never goes into I-74. Crawfordsville Rd. will have its own diamond interchange. It could be assumed then that US 136 will end at the 465 interchange. Speaking of the ITS signs, even though I-74 on the southeast side goes into I-465 there are still mile markers on the inside loop for about a mile until Arlington Ave. Explain that.