I'm surprised at the disparity in cost of the two vetoed studies, $28M for I-44 compared to $2.5M for I-72. It makes me wonder if the I-44 study may not have been vetoed if the cost were closer the $2.5M figure because parts of I-44 seriously need widening. I can see the I-72 study being cancelled as it's more a feel-good study for Northern Missouri; no chance I-72 happens in the next ten years though incremental improvements (like better traffic flow around Cameron) could happen without an I-72 study. I don't know what was vetoed concerning improved traffic flow around Hannibal. If it was just something like improved stop light timing I'd have vetoed it too. Hannibal needs a bypass, at least one connecting US 61 south of town to US 36 west of town; traffic could still use US 36 and US 24 as they currently exist even with the diamond interchange where the two highways meet. It would beat having to go through Hannibal. The slowdown isn't that bad in a car though it seems every time I went through Hannibal since the AotS opened there was another stop light. But all that stopping and starting must suck for truck drivers.
The Hannibal Bypass study is already underway and active. There are 3 routes they are looking at and somewhere in AARoads, there was a brief discussion on it. I remember posting on it some time ago.
I suspect, but I haven't read it, the scope of the I-44 study was much broader than the I-72 conversion study and may account for the higher cost of it.
Not to get off topic, but I seriously believe I-44 needs a rethink in several places. Legacy geometry, cost cutting decisions in the late 60's/early 70's by simply reusing US-66 ROW in places. Valleys that were difficult (or expensive) to cross so they made massive cliffside cuts to make the bridges smaller. Newer pre-cast bridge tech make bridges much cheaper to build and maintain than the common steel spans of the 60's/70's. I would love to run a computer based analysis on that route and see what it comes up with based on current material costs and labor rates.