I add anywhere from 3-5 miles on each leg of my commute depending on that whole traffic situation. The shortest route distance and timewise would be 19 miles but that would take 7 miles of 8 lane 50mph no shoulder crazy commuter free for all road which I took all of once for 2 miles.

My route in this morning is my quickest safe route which is 22 miles and if I leave early enough it is pretty empty traffic wise. It is a little longer then it was due to some highway construction on 121 diverting the traffic onto the service road so I backtrack a little bit.
On the way home I will sometimes take a turn to go one block over the wrong way to avoid a really bad section of 2 lane road if there is alot of traffic. I even started taking a left and a u-turn rather then a right at this busy stop light in front of hte nissan building. I don't know what changed but it seems everyone gets out at the same time now so they just pack that right turn lane solid and are really aggressive for that block before the highway entrance.

None those add as much time as my police escort did today on my 3 miles safety short cut through a development I ride through for my commute. 8 stop signs at least and on the section I can get my speed up I had to keep it slow because of the speed limit. I think he only stopped following me when I hopped on the sidewalk to go a block and trigger the crosswalk on 2499. Once it is past 6am (I was running late) there is no easy way across that road since the waves of commuters are in full force doing 60mph+