The Jacques Cartier Bridge is completely closed to vehicular traffic during the Fireworks Competition at La Ronde during the summer. It becomes foot traffic only, sometimes drawing crowds of 50,000+.
The fireworks competition generally runs for about six weeks, from late June to the end of July. Events are held on Wednesday and Saturday nights, commencing just before 10:00 PM. Bridge traffic is closed as of 8:00 PM, and is re-opened when the bridge is cleared of pedestrians (usually between 11:00-11:30 PM).