Thursday, January 24, 2008

Why Don't Cyclist Just Stay In Single File?



Why Don't Cyclist Just Stay In Single File?

By Tim Long

I hear this question from non-cyclist (we'll call them 'drivers') all the time. This is one of the rated-G comments I usually hear drivers make about cyclists. Commonly, though, drivers initiate the argument against cyclist in this manner, "Why do they [cyclists] take up so much of the road? They ride double-file and act like they own the road."

So, instead of going into long descriptions about the physics of slipstreaming, energy conserved, angles of the wind, etc., I thought some nice, simple diagrams would work well. I do realize that, like drivers, there are good, skillful and considerate cyclists, and there are, unfortunately, unskilled, knucklehead cyclists... But we'll cover that topic in a future article. Here are some peloton (a group of riders) formations.

Bike formation--Riding the wind
Riding the wind. A peloton adopts distinct shapes depending on wind conditions. If there is no appreciable wind, or motorized vehicles, from any direction, the peloton occupies the whole road and is moving at an even and steady pace.


Bike formation--headwind
Headwind.
The peloton adopts a wedge formation, like a group of pigeons in flight, with one rider leading the pack from the middle of the road. The flanking cyclists ride in the slipstream of the rider in front. The lead rider drops back as a fresher rider replaces him.


Bike formation--crosswind
Crosswind. The peloton forms into what the pros call "echelon"--a defensive formation seeking cover from the wind. The peloton has to break up when it occupies the full width of the roads so that the riders disperse into several separate echelons.


Typical bike formation--Indian file
Indian file
. A typical small group formation

2 comments:

Anonymous said...

"Drivers" do not "Own" the road. Drivers, Riders, Runners all have use of the road. Unless,that is, the road specifically states that any one particular mode of transportation is not allowed. But for the most part, all are allowed. Speed limit is just that. Limit. Not requirement. Everyone needs to get along and share the roads. Now, I am not saying run right out and jump in the middle of traffic. The Laws of Physics and some good judgement do apply. No need to go pressing the point. Hence no need to try to ride/run down South Blvd. If you don't get shot you'll most likely get hit. But there are plenty of places where the phrase "Share the Road" applies. Everyone will get where they are going. Hopefully.

CHFmag said...

Great points! On the flip side, when lager groups of cyclist are out riding, they do tend to become emboldened against drivers. That topic will be covered next week.