Complex sentence: After completion of the I-35 freeway, the state maintained MN 23 through Hinckley and Sandstone; now MN 23 is concurrent with I-35 from Hinckley to Sandstone.
Split into simpler sentences: After completion of the I-35 freeway, the state maintained Highway 23 through Hinckley and Sandstone. In the present day, Highway 23 is now concurrent with I-35 from Hinckley to Sandstone.