Both of us plan on using our bicycles as our bug out vehicle. This article discusses some of the things which can be done with a bike.
Part 1)
http://www.askaprepper.com/the-bicycle-as-a-bug-out-vehicle-part-1/Part 2)
http://www.askaprepper.com/the-incredible-and-efficient-use-of-a-bicycle-as-a-bug-out-vehicle-part-2/Part 3)
http://www.askaprepper.com/the-incredible-and-efficient-use-of-a-bicycle-as-a-bug-out-vehicle-part-3/In case your Primary bug-out vehicle is NOT a bicycle, I will point out that circumstances may prevent you from using that Primary vehicle... Backup plans make sense...
Living in a highly urban area (225,000 Pop.) Bugging Out has a higher probability of happening than if we, for instance, lived away from a city. Your Mileage May Vary!
There Are advantages to using bicycles, just as there are dis-advantages. One advantage which comes to mind is the ability to use railroad tracks AND railroad bridges, in case the vehicle roads and bridges are blocked.
An item which is not addressed by the author is the use of a bicycle trailer. I use one and it increases my carry weight by at least 100 lbs and probably (in a pinch) I can load 250 lbs without exceeding the trailer carry weight. Yes, it makes for slower going, but higher survival potential (more of everything).
I recommend reading the comments which follow each part.