Round 1 tickets have booked out. Round 2 will be released on 1 June. Watch the 9 News 6pm bulletin on this date for the opening announcement.
Registrations are now open for an opportunity to take part in a once-in-a-lifetime experience inside the new Legacy Way tunnel.
See all the entries in the current Lord Mayor's Young Environmental Photographer of the Year Competition and vote for your favourite.
Check out the Artforce 2014 winners. Artists painted 76 traffic signal boxes from December 2013 to December 2014.