LRT Bridge at Dawn
The starburst happens more so when you use F/22 to stop the aperture down to the max. This effect should happen if you stop it down beyond F/16 and smaller. The small aperture blades will be shaped in this pattern as opposed to wide open aperture which gives you rounder light passing through.
View my flickr at http://www.flickr.com/photos/25143606@N03/