Expansion of I-70 to 3 lanes each direction has started but…

I was driving KC to St Louis the other day and see they are in the middle of the I-70 expansion but why did the start it in the middle of the state. Basically from mile marker 137 to 144. What is the reasoning behind this? Any civil engineers out there with thoughts on this? I assumed they would have started at one major city and worked their way down I-70 to the other major city.

I was driving KC to St Louis the other day and see they are in the middle of the I-70 expansion but why did the start it in the middle of the state. Basically from mile marker 137 to 144. What is the reasoning behind this? Any civil engineers out there with thoughts on this? I assumed they would have started at one major city and worked their way down I-70 to the other major city.