Off topic:
I went across that bridge (by subway) a few times a week for a year and never knew it was called Prince Edward!
One of the bridges from Angelsey into 'mainland' Wales has something similar - road upstairs, main train line downstairs. It was substantially rebuilt in the mid 70s after a fire. The road was only added in the rebuild.
http://en.wikipedia.org/wiki/Britannia_Bridge
/Off topic