Is there a good map yet showing the entire proposed length of I-69, including the three splits in Texas? I've not been able to find any yet.
Not quite sure how well
this January 2013 map will work for you. (pp. 7-8/122 of pdf):

As Texas is currently exploring an east‐west connection along State Highway (SH) 44 from U.S. Highway (US) 59 in the City of Freer to US 77 in the City of Robstown as an alternative to SIU 31, this alignment is included in Table 1 as “31 Alt.”
editI-2/US 83 is not part of the statutory I-69 Corridor, but Texas officials like to consider it as part of the I-69 "system".
It's difficult to see on my snip of the map, but the tiny, easternmost "fourth prong", SIU 32, is SH 550 from the Port of Brownsville to I-69E/US 77, and can be more easily seen at the linked version of the map. There are no current plans to put interstate shields on SH 550, but there may be a remote possibility that it will one day become an eastward extension of I-2.
SIU 9B is I-269, SIU 28 is the I-69 Connector/Future I-530, and SIU 29 includes the recently designated I-369.
Also, the I-69 statute technically includes a section from the Port of Corpus Christi to I-69E/US 77. I
think that is I-37 and have emailed FHWA to see if that is correct (no response yet). Any insight here on that question will be appreciated, but I suspect that is why it is not included as part of the "blue line" "I-69 Corridor" on the map. However, if it
is I-37, then it will make for a great trivia question: What was the first interstate designation given to a part of the I-69 Corridor in Texas?
