When was US 75 in Texas completed?

[bugo]

When was the last stretch of the US 75 freeway in Texas completed, and which stretch was it?  I'm not talking about the rebuilt Central Freeway, but the last stretch that bypassed a surface route.

[NE2]

US 75 extended beyond the end of I-45 in Galveston. Other than that, it was the bypass of Denison: http://www.lib.utexas.edu/maps/topo/250k/txu-pclmaps-topo-us-sherman-1977.jpg
The old alignment was officially numbered Loop 93 in 1984: http://www.dot.state.tx.us/tpp/hwy/ss/ss0093.htm

[agentsteel53]

US 75 extended beyond the end of I-45 in Galveston. Other than that, it was the bypass of Denison: http://www.lib.utexas.edu/maps/topo/250k/txu-pclmaps-topo-us-sherman-1977.jpg
The old alignment was officially numbered Loop 93 in 1984: http://www.dot.state.tx.us/tpp/hwy/ss/ss0093.htm

is that a state route 75A I see there?  Is that how it was signed in the field?  and is it an old alignment of US-75?

[NE2]

is that a state route 75A I see there?  Is that how it was signed in the field?  and is it an old alignment of US-75?

SH 75A was never old US 75. It was initially SH 91 (which it is again); a 1926 map shows but does not label the original SH 91 (shown better on a 1940 county map). Interestingly, both US 75 and SH 91 were federal-aid highways in 1940. It appears that pre-dam SH 91 connected to what's now SH 70A into Kingston, OK. Also interestingly, Oklahoma's original SH 12, which became US 75 north of Calvin, followed present SH 1 from Calvin to near Madill, continuing to the state line and SH 91.

In short, SH 75A was not US 75, but the south end of it could have been had US 75 not gone south from Calvin to Atoka. I would guess that 75A was designated to provide an alternate to the two-lane Red River crossing on US 75.

[agentsteel53]

thanks for the info!

when did TX get rid of its last suffixed route?

[NE2]

when did TX get rid of its last suffixed route?

I think 75A was the only one, which returned to 91 in 1994: http://www.dot.state.tx.us/tpp/hwy/sh/sh0075a.htm

[agentsteel53]

I've seen references to pre-1939 suffixed routes.

I also know of a US-80A in what looks like the late 1940s or 1950s.

[Brian556]

There was a pre-1940 SH 2A south of Ft Worth.
The 1946 map shows an ALT US 81 and an ALT US 377 in Ft Worth

There was a SH 24T in Denton and Collin Counties. the weird thing about it is that the "T" appears to have been added to the old alignment after SH 24 was moved to a new alignment between Denton and Frisco in 1951. In 1955, SH 24T was decomissioned, and FM 720 functionally replaced parts of it.
See Map Below:

[NE2]

T presumably stood for Temporary. I have no idea how it was signed.