TRAFFIC ALERT: Speed Limit Lowered on FM 1788 November 17, 2009 at 3:11 PM CST - Updated June 19 at 1:21 PM MIDLAND COUNTY - The speed limit on a portion of FM 1788 has been lowered. The speed limit on 1788 from the Midland International Airport to Highway 191 is now 65 miles per hour. The speed limit had been 70 miles per hour. New speed limit signs have been installed. This will affect drivers from both Midland and Odessa who use SH 191 to travel to the airport, as well as through traffic north and south on FM 1788. TXDOT says the limit has been lowered due to commercial development along FM 1788.