Assessment completed in May 2018. Closures The Gardiner Expressway and Don Valley Parkway close annually for two events. The Ride for Heart closes the Gardiner Expressway east of the Humber River and the entire length of the Don Valley Parkway in both directions and is typically held on the first Sunday in June from 2am to 2pm. The Toronto Triathlon Festival closes the eastbound lanes of the Gardiner Expressway east of the Humber River and the northbound lanes of the Don Valley Parkway south of Eglinton Avenue and is held on the third Sunday of July from 2 am to 12 pm. The annual closure of the Gardiner Expressway and Don Valley Parkway for Ride for Heart has been criticized for the amount of disruption it causes and its impact on traffic congestion. A Toronto City Councillor criticized the event and believes it should be relocated to city streets. This event also causes a complete shutdown of all GO bus service to Union GO Bus Terminal from 9 am to 2:30 pm on the day the event is held and significant delays to Toronto Transit Commission bus and streetcar service. On March 5, 2007, a section of the Gardiner Expressway was closed between Spadina Avenue and Jarvis Street due to the threat of ice about the size of a kitchen table falling from the CN Tower. Several days before, a storm with snow and freezing rain had caused a great deal of ice to accrete on the tower. As the weather warmed and the sun heated the tower's concrete, large pieces of ice began falling off the tower and falling hundreds of metres to the ground below. Although nobody was injured, the Gardiner was closed as a precautionary measure. On March 6, cooler weather reduced the risk of falling ice, and prevailing wind conditions had changed, reducing the risks of ice falling onto the highway; the road was reopened subsequently. On May 3, 2007, at around 7:00 a.m., a chunk of concrete about the size of a loaf of bread fell from the Kipling Avenue bridge onto the Gardiner Expressway. It missed cars and caused no damage, bouncing harmlessly away despite the morning rush hour traffic. City crews were quickly sent to close off lanes of traffic to begin an inspection of the structure, which is a late 1960s post-tensioned design built by the province while it was still part