What is a section of independent utility (SIU)?
Sections of independent utility (SIU) are corridor sections that have logical beginning and end points and represent transportation projects that can be built and function without additional facilities being built at either end. The I-69/TTC project currently has 14 SIUs. The number of SIUs may change as the environmental and engineering studies progress to more advanced stages. BACK TO TOP In northeast Texas, will a first phase (Tier 1) study corridor include the alignment selected in the U.S. 59 Master Plan, could the I-69/TTC highway portion be located on the alignment selected as a result of the U.S. 59 Master Plan study? Yes, the I-69/TTC Tier 1 study area includes the entire alignment selected in the U.S. 59 Master Plan; however, we will not know if the proposed alignment selected as a result of the I-69/TTC environmental and engineering studies will be the same alignment that was selected as a result of the U.S. 59 Master Plan until the latter stages of the Tier 2 study.
