the road. North Saint Mary's College is the access road to the Indiana Toll Road (Interstate 80/Interstate 90). The road passes under the Indiana Toll Road, as it passes through commercial properties heading towards the state line. SR 933 ends at the Indiana–Michigan state line; the roadway continues into Michigan as M-51. No part of SR 933 is included as a part of the National Highway System (NHS). The NHS is a network of highways that are identified as being most important for the economy, mobility and defense of the nation. The highway is maintained by the Indiana Department of Transportation (INDOT) like all other state roads in the state. The department tracks the traffic volumes along all state highways as a part of its maintenance responsibilities using a metric called average annual daily traffic (AADT). This measurement is a calculation of the traffic level along a segment of roadway for any average day of the year. In 2010, INDOT figured that lowest traffic levels were the 12,300 vehicles and 197 commercial vehicles used the highway daily on a section between Marion Street and Riverside Drive north of downtown South Bend. The peak traffic volumes were 25,040 vehicles and 2,610 commercial vehicles AADT along a section of SR 933 near Bittersweet Road in Mishawaka. History In 1917, Main Market route number 1 was given to the north–south section and Main Market route number 2 was the given to the east–west route that SR 933 takes today. Main Market 2 was also known as the Lincoln highway. In 1926, at the creation of the U.S. Routes, SR 1 was changed to US 31 and the east–west stayed as SR 2. Then the SR 2 section became US 33 in 1935, and US 33 was concurrent with US 31 north of Sample Street. In 1991 the US 20 bypass opened around Elkhart and South Bend and in 1998 INDOT removed US 33 north of US 20 to the Michigan state line. The road was to come under local jurisdiction in Elkhart and St. Joseph counties. Local governments in Elkhart County, mainly the city of Elkhart, accepted jurisdiction of the road, while St. Joseph County did not accept local control and the road became SR 933 within that area. In 2004, INDOT tried to eliminate SR 933 and again St. Joseph County did not accept local control so the designation remained unchanged. In