To continue the graph interpretation on motorcycle safety, I found some estimate of average trip lengths and winnowed down the data set to those that I could deal with.  We don’t measure trip numbers for traffic modes like cars, truckle, SUVs or motorcycles, because the easier unit to measure is vehicle miles travelled (VMT).  Last week, I deviated from VMT to focus on Passenger Miles Traveled, but this week, I attempted to look at something even more personal: Trips.

A trip represents a decision to leave where we are to get what we want somewhere else.  We could walk across the street in minutes to get that thing, or fly across the country in hours.  A trip is a better unit of transportation activity than vehicle miles traveled or passenger miles traveled.  Trips are agnostic about the means of transportation, the distance or speed that we take.  If come thing is within biking s=distance we are more likely to bike to it than if it was within flying distance.

Of course, we are not going to take some modes because they don’t make sense for the scale of trip that we use.  We wouldn’t take a ferry to get someplace unless there was a large body of water between us and our goal.  We wouldn’t fly if the drive to the airport took longer than the flight itself, or if we were traveling with a lot of passengers.  We wouldn’t take transit if there were no transit routes near us or our destination.  Also, we wouldn’t bike or walk if the prevalence of traffic between us and our destination made biking unpleasant or even dangerous.

A Motorcycle is a nice compromise between biking and traffic, as it is lightweight and as fast as traffic.  The problem with this is that it can get into a lot more trouble than a bicycle at those speeds.  Going with an estimate of 5 miles per average motorcycle trip, I found risk of driving motorcycles in traffic, for accidents, injuries, and fatalities on a per trip basis.  I present these below: