Ladder 11 is a fire truck from Fire Station #11 on Preston at Eccles (one block south of Somerset West). It's in Little Italy and just around the corner from Chinatown. They've therefore decorated the ladder with an Italian flag design with a Chinese dragon.
Here, Ladder 11 and a number of other fire trucks were responding to an alley fire at Lyon and Cooper on Canada Day 2011. I don't think there was significant damage or injury, as the fire didn't make it to any of the papers. I also tweeted a couple of photos at the time from my Twitter account, @Centretowner
Some, but not all, other stations decorate their ladders as well. A couple more were on hand for the opening of the Ottawa Firefighters Memorial back in 2009.
[Look for more one-photo posts under the label Singles]