city. It is omitted after Exit 115 heading eastbound, from where only Tucson is signed until the freeway defaults onto eastbound Interstate 10 (which eventually reaches that city). Interstate 10 heading eastbound from its starting point to the California–Arizona state line uses the following towns as control cities: San Bernardino, Indio, and Blythe. Besides Exit 145 in Indio, there is no mention of Phoenix as a control city during this stretch of freeway despite it being the next city after San Bernardino with a population over 200,000. Conversely, Los Angeles is used as the westbound lanes’ control city as far as the eastern city limits of Phoenix until the state line. Interstate 10 heading eastbound in El Paso uses Van Horn, Texas, a small city west of the western terminus of I-20; the junction of I-10 and US 90 is also near Van Horn. Both Van Horn and San Antonio are used, due to the latter being the next major city along the route. Interstate 10 in Louisiana uses Lake Charles and Lafayette as control cities in both directions. In Texas, Baton Rouge was previously listed as the eastbound control city beginning in Beaumont to the Texas-Louisiana state line. Recently updated signs now list Lake Charles as the eastbound control city starting in Beaumont at the request of the Louisiana Department of Transportation and Development. From New Orleans to the Louisiana-Mississippi state line, I-10 eastbound signs list the smaller communities of Slidell, Louisiana and Bay St. Louis, Mississippi as control cities, rather than Gulfport, one of the two largest cities (with Biloxi) along the Mississippi Gulf Coast. Interstate 49 in Louisiana uses Opelousas, a small city, as a control city northbound from Interstate 10 in Lafayette to the junction of I-49 and US 190, and southbound from Louisiana Highway 1 in Alexandria to US 190. US 190 is heavily traveled between Opelousas and Baton Rouge, even with the presence of I-10, probably the reason why Opelousas is listed as a control city. Interstate 55 heading northbound out of LaPlace, Louisiana uses Hammond, where it crosses Interstate 12. I-12 east from its origin in Baton Rouge to I-55 uses Hammond as the control city, as does I-12 west from its ending at the I-10/Interstate 59 junction in Slidell to I-55. Hammond's use is likely due to its location of Southeastern Louisiana University, the state's third largest public university. On Interstate 55