5th will be slow while that building has the right curb lane closed, once it reopens it'll function just fine with three lanes like it did a couple weeks ago. Temporary pain.
If people want to see the designs, parking configurations, see here:
12th Ave
http://www.calgary.ca/Transportation...12ave-maps.pdf
8th Ave
http://www.calgary.ca/Transportation...-8ave-maps.pdf
9th Ave connector
http://www.calgary.ca/Transportation...-9ave-maps.pdf
5th Street
http://www.calgary.ca/Transportation...k-5st-maps.pdf