Complex sentence: I-20 leaves the interchange with I-10 with a speed limit of 80 until Milemarker 89 and generally heads to the east-northeast passing by the cities of Odessa and Midland while transitioning from the West Texas desert to the prairie.
Split into simpler sentences: I-20 leaves the interchange with I-10 with a speed limit of 80 until Milemarker 89. Interstate 20 also generally heads to the east-northeast passing by the cities of Odessa and Midland while transitioning from the West Texas desert to the prairie.