One of the basic aspects of highway geometrics is to design for the vehicles which use the roads. To help with this, technical guidelines often include details for “design vehicles” – average or typical dimensions for a vehicle in a particular class (car, truck, bus, etc.).
So far as bikes are concerned, the guidelines generally only refer to the “standard” two-wheel bicycle.
However there are many different types of bike. And regarding sizes, some bikes are even wider / longer / or higher than an average car.
This gives us two questions (which apply also to other vehicle types, and not just to bikes):
- how can bikes be classified
- what are the typical dimensions for each class of bike
One way to classify bikes is in terms of the number of wheels which the vehicle has.
I created a short document on this topic and uploaded it to Scribd. You can view the document or download a free copy from this link.