the Texarkana MPO has studied a new terrain I-69 Planning Corridor with Alternative Route from northeast of Wright Patman Lake to I-30 and over to I-49 ...
Preliminary alignment planning is underway on the I-69 Texarkana West Loop. The relief route would connect to Interstate 30 at a point near the former Lone Star Army Ammunition Plant site, now known as TexAmericas Center. It would run south to connect to the existing US 59 route at a point northeast of Wright Patman Lake ... Unlike the Texarkana MPO study, no mention is made of an I-30 to I-49 link ... Speaking of costs, I hope the Texarkana MPO preserves the corridor for the I-30 to I-49 section of the I-69 Spur and avoids the situation that NLCOG is currently facing with the LA 3132/Shreveport Inner Loop in Louisiana. 
After sending out an email with some questions about the I-69 Spur, I eventually was referred to and had a very interesting conversation with an individual who serves on both the I-69 for Texas Alliance and the TxDOT I-69 Segment 1 Committee.
Regarding the I-30 to I-49 section of the I-69 Spur, he said that the Segment 1 Committee's study area has a northern terminus at I-30 because the Arkansas section of I-49 from I-40 to the Texas state line will not be completed for a very long time. That said, the Texarkana MPO continues to study the I-30 to I-49 at N. Stateline Ave. connection as a long-term proposition (and who knows if they will preserve the corridor).
I then asked if they had ever studied a "southern connection" of I-49 and the I-69 Spur south of Texarkana (sort of an eastern extension of the West Loop). He gave an emphatic "no" to that possibility and then gave me a "big picture" view of the I-69 Spur. The thought is to pursue the notion of TexAmericas Center becoming an inland port, and the "southern connection" would not serve that thought. The idea is to lease the air space over the I-69 Corridor from Texarkana to an as yet undetermined Texas Gulf port. A private group of investors would then build an elevated
Freight Shuttle track within the ground-level ROW of I-69 between Texarkana and the Gulf port. The money from the air rights would be used to at least partially fund I-69 construction along the route of the track. Also, the hope is that TexAmericas Center would also be the location of a manufacturing plant for the shuttle cars. The cost per mile for freight using the Shuttle is estimated to be 30 cents per mile and the cost per mile by truck is estimated to be $2.30 per mile. Apparently, this idea is being studied very seriously.
If nothing else, this idea represents creative thinking by using existing ROW and, in a sense, having freight shippers pay a "toll" instead of private drivers.
I wonder if this concept could work for I-49 South: "America's Energy Corridor"?
It will be interesting to see if this concept gains any traction.