Interstate Highways better known by their State Route Number?

[kphoger]

I've seen official documents and maps call the short section of US 75 in downtown Dallas as I-345 even though it's unsigned, though not sure if people in Dallas generally call it I-345 over US 75.

It's not signed as I-345, is it?  Why would locals call it by a number that doesn't show up on any signs?

[Scott5114]

Why would locals call it by a number that doesn't show up on any signs?

something something Boston, something 128

[kphoger]

Why would locals call it by a number that doesn't show up on any signs?

something something Boston, something 128

Yes, I knew the answer would have nothing to do with Dallas.   

[Big John]

I have had instances of Dallas locals refer US 75 as I-75 and they did not like me telling them that I-75 does not enter Texas.

[Scott5114]

I have had instances of Dallas locals refer US 75 as I-75 and they did not like me telling them that I-75 does not enter Texas.

I'm not surprised. Dallas locals generally don't like you telling them that places other than Texas exist.

[SkyPesos]

I have had instances of Dallas locals refer US 75 as I-75 and they did not like me telling them that I-75 does not enter Texas.

I'll call Dallas 'Detroit' too then. Both cities start with the same letter, like how I-75 and US 75 have the same number 

[jp the roadgeek]

There are some in NJ who still call the portion of I-78 between the GSP and NJTP "Route 24"

And I'm sure there are many who still refer to the Northeast Extension as PA 9.

Not many left who refer to the portion of I-84 between East Hartford and Sturbridge as Route 15, but more people refer to the 5/15 overlap (especially north of where it leaves the Berlin Turnpike) as Route 15

[kernals12]

Why would locals call it by a number that doesn't show up on any signs?

something something Boston, something 128

Except it is signed 128.

[vdeane]

Why would locals call it by a number that doesn't show up on any signs?

something something Boston, something 128

Except it is signed 128.

MassDOT may have some ground-level signage, but it's easy to miss and clearly less prominent than I-95.  It's obviously intended to appease the locals more than anything else, and I'm not sure if even MassDOT took it seriously prior to the mile-based exit number conversion.

[kernals12]

Why would locals call it by a number that doesn't show up on any signs?

something something Boston, something 128

Except it is signed 128.

MassDOT may have some ground-level signage, but it's easy to miss and clearly less prominent than I-95.  It's obviously intended to appease the locals more than anything else, and I'm not sure if even MassDOT took it seriously prior to the mile-based exit number conversion.

It was fun over the summer when, for work, my colleague from Central Mass was told by the GPS to go on 128, and I had to explain to him that 128 and 95 are the same freeway.