The Illinois Tollway expects about 8 million vehicles to travel the tollway system from Friday to Tuesday during the Labor Day holiday weekend. The heaviest travel is expected Friday, when about 2 million vehicles are projected to use the 294-mile tollway system. On an average day, more than 1.6 million vehicles use the Illinois Tollway. Holiday work zones To accommodate holiday travel on the Illinois Tollway, construction activity will be restricted to better serve tollway customers. Work may continue behind barriers, with long-term lane closures remaining in place to keep construction projects on schedule.