Those studies help the department develop short-term fixes, such as new signs; medium-term fixes, such as fixing ditches; and long-term fixes, such as comprehensive redesigns.
In this case, ODOT began work on improvements to the Pfeiffer Road/Interstate 71 interchange in January 2013.
They include creating a northbound I-71 lane from Pfeiffer to Interstate 275. Currently, vehicles entering northbound I-71 from Pfeiffer must merge with I-71 traffic before reaching the exit lanes for I-275. This causes backups starting as early as 2 p.m. most weekdays.
The project will also improve access onto I- 71 from eastbound Pfeiffer Road through dual, dedicated left-turn lanes, state officials said.