Joining the Bike Trailer Club
We purchased our first bike trailer last week, a sparsely-used 10-year-old Burley in near perfect condition. It has a payload capacity of 100 lbs, which further reduces our need to drive a car. We paid $250 for it, just over half of what it costs new. With the help of commutesolutions.org, I calculated that if we use it in place of the Subaru Impreza for 379 miles then it will pay for itself, when personal, environmental, and social costs are all taken into account. Here is the math:
Direct Costs
Fuel (based on $4.55/gal, 25 mpg): 18.2¢/mile
Maintenance and Tires: 5.3¢/mile
Indirect Costs
Accidents (government-paid cleanup, lost economic activity, etc.): 4.6¢/mile
State and Local Construction, Improvements and Repair: 1.1¢/mile
State and Local Highway Maintenance and Operations: 0.6¢/mile
Parking (commercial and employer-paid, including government tax): 6.4¢/mile
Waste Disposal (highway cleanup, tire and oil removal): 0.3¢/mile
Air Pollution Damage (health costs, crops, trees, materials, etc.): 5.3¢/mile
External Resource Consumption Costs (economic trade and natural resource use): 3.2¢/mile
Road Noise (property value decrease and abatement): 1.1¢/mile
CO2 Reduction (motor vehicles only): 0.5¢/mile
Water Pollution and Hydrologic Impacts: 1.7¢/mile
Transportation Diversity and Equity: 0.7¢/mile
Barrier Effects on Pedestrians and Bicycles: 1.2¢/mile
Land Use Impact Costs: 7.4¢/mile
Roadway Land Value: 3.2¢/mile
Congestion Costs: 5.4¢/mile
Total Cost Per Mile: $0.66
Purchase price of bike trailer
divided by
Cost of operating a vehicle per mile
equals
Number of miles required to use my bike trailer in place of my car to offset purchase price
$250/$0.66 per mile = 378.8 miles
That's just under 8 miles a week for a year. I think we can handle it.