south in Mississippi, all signs south of Jackson list New Orleans as the control city. Interstate 40 in Arizona uses Flagstaff eastbound from the California state line to the junction of I-40 and Interstate 17, and westbound from the New Mexico state line to I-17. This is because Flagstaff is I-17's northern terminus; I-17 north from Phoenix uses Flagstaff for the same reason as well. Flagstaff is also the gateway to the Grand Canyon National Park. As Interstate 69 is not complete to Indianapolis as of 2019, the northbound approaches south of Bloomington do not have any control city. Instead they simply read "I-69 North". North of Bloomington, however, Indianapolis is used as a control city. This is due to this section of interstate running concurrent with State Road 37, which does currently connect to Indianapolis, and has it as a northbound control city. The entire interstate does currently use Evansville as the control city on the southbound approaches. Likewise in Kentucky, I-69 uses Henderson as a control city due to the fact of the highway currently dead-ending there. Interstate 70 in Missouri often uses several intermediate towns between the large cities at opposite ends of the state along the highway, Kansas City and St. Louis. Columbia is most commonly listed due to its central location within the state and the presence of the state's flagship university, the University of Missouri. In the St. Louis area, Indianapolis is not listed as a control city on eastbound I-70 until the highway crosses into Illinois. Also, Louisville is not listed as a control city on Interstate 64 eastbound until entering Illinois. St. Louis is the control city on I-64 westbound beginning in Louisville, and I-70 westbound beginning in Indianapolis. In the Kansas City area, Topeka is not listed as a control city on westbound I-70 in Kansas City, Missouri until the highway enters the Downtown Loop. Conversely, St. Louis is listed as the control city on eastbound I-70 beginning with the junction at Interstate 435 in Kansas City, Kansas. I-55 in Missouri also uses intermediate cities as control cities, notably Cape Girardeau, the largest city along the route between St. Louis and Memphis. Most I-55 northbound signs in Tennessee and Arkansas list St. Louis as the control city. Limon, Colorado, (estimated population 1,930 in 2017) is listed as a control city along Interstate 70 in Colorado eastbound starting in Denver, and westbound