Short Bike Commutes Can Be Costly

Andy Cline, at Carbon Trace, has a short bike commute. He knew where he was going to be working for many years to come and picked a house nearby. I confess that, despite a slight bittersweet taste when ending a memorable commute, I was quite pleased to trade my 20 mile v2 commute for my 7 mile v3 commute. However, I have discovered that there really IS no such thing as a free lunch and that a shorter commute does carry some cost. You might wonder, HOW is anyone worse off in any respect whatsoever by suddenly living closer to work without even having to have moved? Andy Cline might wonder, “Have I missed something?” Well, yes.

I have now made my new v3 commute long enough to project my weekly commute mileage. Conveniently, I also tracked my weekly mileage on both the v1 and v2 commutes. I find it interesting to note that the results do NOT show I double my bike mileage if I double my commute length, but the bike mileage does increase. In the case of a bike, decreased bike commute mileage means decreased calorie burn. Decreased calorie burn means either one must cut down food consumption or make special trips to go work out to maintain equilibrium. Acch. Diet and exercise!

That is bad enough, but it transpires that I can be more specific than that. Since I’ve kept commute logs, I can quantify things and determine precisely the penalty I shall have to pay for my new, short and easy commute.



Published Calorie Expenditure Chart

 To start off, if you look at the published table, riding a bike will cost somewhere between 40 and 50 calories a mile for the vast majority of us. While wind resistance plays a role, going slower doesn’t help much with basic rolling along, and few of us are going to be riding to work at an average speed over 20mph. For purposes of the analysis, energy expenditure on a bike commute is about 45 calories per mile and I use that for the calculations below.

The NEXT table shows how my own, historical daily average mileage related to different commutes. Remember in this table that daily average mileage uses seven days per week while the commute takes place in five (if you work seven days a week, we need to talk). In addition, you don’t commute when sick, on holidays, or vacation. Finally, remember that working at a more remote location means there will be more days in which driving is needed, simply to make it to appointments or other things where the bike simply isn’t fast enough to make it between two distant points in the needed time. The really short commute assumes that I’d be able to ride even a bit more frequently than my new, 7 mile commute. Even if you work at home, there will occasionally be appointments and such that simply mandate a motor vehicle, whether it is an owned car, a taxi, or a rented car.

Bike Commute Cost Comparisons

The table sorts things into increasingly long commutes. As you can see, based on historical numbers, commutes start to require significant payments as they get shorter, and the penalties in weight gain for not making those payments get more severe as well. Of course, there are many ways to vary the payments; for example, I personally could avoid the 17 pound gain by omitting 2 cheese sticks per day. Looking at the table, I thank my lucky stars that I work in an engineering job rather than the barista or Walmart greeter jobs that might fall within the theoretical “very short” commute. I’d be stuck going to the gym twice a day every day or undergoing serious food deprivation. How DO those motorists (and Andy) stay slim and trim? Perhaps they dollarize their time savings and spend it on bariatric surgery and Jenny Craig…

The Cost of a Short Commute - Extra Workouts, Dietary Rationing, or Weight Gain!

High Gasoline Prices and Bike Commuting



Coffee I Make is Better Than This,
But I'm  no Barista

 Better as a Barista
Andy, at Carbon Trace, made a very good post about gasoline prices going up. There seemed to be a consensus in the comments that high oil prices are good for bike commuting. I think that ignores the reality that automobile commuting is an incredibly efficient use of time for commutes of moderate to long distance. What’s more, many if not most, people are comfortable in their warmed/cooled vehicles which helps foster an overwhelming, if grossly overblown, fear of getting hit by an automobile. Simply put, bicycle transportation use is not driven strongly by oil prices. It is driven by personal circumstances and desires, or where it has become fashionable, which is why bicycle share tends to be high in university towns and in dense locations.

My Coffee is NOT as Good as This

Before I started this blog, during the time I rode my bike to Haltom City (a distance of 14 miles from my home), gas prices went up a lot, hitting $4/gallon at one point. When prices were high, I often got asked whether I bike commuted to save money. The answer was, “No, I’d actually do better to work as a Starbucks barista to pay for the gas and continue to drive to work.” Amazingly, my engineers briefly speculated about which Starbucks I was moonlighting at. That economics of time versus expense is true whether gasoline is $2 per gallon or $10 per gallon. Still, I saw a lot of extra bike commuters and the TRE train got a lot of new riders, so most people did not actually do the math. Since you are reading this, you won’t NEED to do the math, which follows in a simplified form.


Paying for Expensive Gas – Warning – Simple Math Content!
My v2 commute was about 20 miles each way. I already owned a fully depreciated motor vehicle, so my main variable cost was the cost of fuel. Conveniently, my Jaguar gets about 20 miles to the gallon on the commute, so it uses 2 gallons of fuel each day I commute on a 40 mile round trip. If fuel costs $10 per gallon, that’s $20 per commute. $20 to drive to work one time is certainly not chump change, but spending that $20 saves me 2 hours per day compared to bike commuting. If I didn’t enjoy the bike commute, I could work the two hours as a Walmart Greeter, or as a barista making $10/hour and break even in both time and dollars. As gasoline dips to less than $10 per gallon, I’d have to work less time to pay for the gas needed to save the commute time. At $4/gallon, I’d be WAY ahead to simply greet people a little longer or pour a few extra lattes. At my current salary as an engineer, you might safely guess I’d have to work considerably less. In the final analysis, this is supported by the European example, where auto commute modes are dominant (far over 50%) despite much shorter commute distances, dramatically higher fuel prices, and strong governmental policies intended to discourage automobile use. Even in Amsterdam and Copenhagen, you see cars all over the place. THAT says a lot, considering the size of those places compared to any large US city, combined with government policies the US is not inclined to consider in the near term.

Managing Commute Distance
Well, you might ask, why not simply move closer to work as Andy Cline has done? I own my home already. Lots of people own their homes. Assuming our Walmart Greeter/barista is a homeowner a household member residing at an owned home, there are large costs associated with moving. Keeping things simple, between real estate commissions and taxes and loan assumption costs, it costs at least 10% of the house value to move from an owned house. For a $200,000 house, we’re talking a moving cost of $20,000. $20,000 buys a lot of gas, even at $10 per gallon. When my company relocated me to Texas, the total move cost came to around $60k – and I lost money in the deal. To be specific, 2,000 gallons of $10 per gallon gas – at 20 miles per gallon – represents 40,000 miles of driving. If the new house was walking distance from work, it’d take five years to break even. Five years is a long time to count on holding a Walmart job. If North Texas was a high price area, or there’s a spouse that doesn’t also work near the new location, or something that gets better mileage than a Jaguar, that break even point would get longer. Kids in school add further to the barrier to relocation.

Where Would I Live to be Near All Four Work Destinations I've Had During the Last Seven Years?

If, on the other hand, I were looking to newly relocate into an area, fuel prices WOULD play a factor. I’d pay a reasonable housing price premium to avoid the extra drive time and cost, and most other people would as well. The trick is that as transport prices get higher, that premium gets larger as well. Over a longer time period, higher transportation costs would drive density up near employment locations, but this is a very long-term effect since cheap transport has been driving density down for generations. In my case, I moved to North Texas six years ago. I’m now working at my FOURTH different work location, none of which has been within ten miles of each previous work location. I see no reason to expect that pace to slacken. Keep in mind that I have worked for only two different employers in the last 30 years, which is more stability than most people achieve in the US. It took us more than fifty years to get into this mess of low density cities; it’ll take us another fifty or more to get back out of it. Andy and I will be dead of old age long before the suburbs disappear that have been enabled by cheap oil. Presuming that dire "peak oil" scenarios are true, we'll simply have to find a way to live in the bed we've made.

Yeah But
Some of you are spluttering at this point; noting transit usage and bike commuting both soared when prices rose in 2008. What’s more, motor vehicle usage dropped. These are different phenomenon, but neither suggests that a large increase in bike commuting will be sustained from fuel price increases. Instead, there will be short-term “deal with the panic” increases, such as occurred in 2008. Once the “panic” becomes “normal,” people will return TO “normal.”

Bike Commuting Soars
As I said, I enjoy riding my bike. The economics of bike commuting are different for me than for someone doing it just to save money (but that is another post). I’m not alone. Many people that enjoy riding a bike do not bike commute. When prices of fuel rise, some people (that enjoy bike riding) decide to try bike commuting and some of them might continue after the price rise has been absorbed. Other people (that may NOT care about bike riding) get the notion that riding a bike to work (or take a train to work) might be a good idea to save money and they buy a bike (or ride the train). Mostly, this second class of new bike commuters don’t keep at it. They don’t really like bike riding to start with, or maybe they believe the danger propaganda, and they might well have purchased a poor quality bike from a big box store (but not MY Walmart).

Regardless of the motivation, in the long term, the economics and convenience of driving versus riding a bike (or taking transit) sink in, and people go back to their car, and I suspect this would be true even with $10 per gallon gas (since the US is comparitively rich, such a price would certainly hit hard at most of the rest of the world more than us, limiting any really giant rise in price). A very few new alternative commuters would discover non-car-commute factors that overwhelm the raw dollars cost per hour saved factor. A bike commuter may come to realize that he/she gets to ride his/her bike for less total time investment than if he/she had to drive to work and THEN ride the bike. A train commuter may find friends to chat with on the train, or discover all that time can be used to indulge a desire to read.

Driving Drops
Driving, in contrast to bike commuting, drops when gas prices go up because people start to think and consider their trips much more. Instead of making separate trip to the grocery store, a deli, a restaurant, and to work, trips will get combined. Some of the marginal trips will be simply omitted. The phenomenon is similar to that which sometimes occurs when a prospective dieter keeps a food consumption log. Simply paying attention to the food intake reduces donut consumption. Simply paying attention to all the car trips reduces them. Unfortunately, after a while, the new situation seems normal and usage returns as focus is lost. It is no accident that Starbucks now emphasizes drive through restaurants much more than they did even five years ago.

Involuntary Bike Commuters
There are, and will be, many bike commuters due simply to the costs of driving. You see their bikes locked at the backs of restaurants. These people are not driven by the price of fuel so much as the inability to raise the amount of money or credit to purchase and operate a car, or even a good bicycle. For them, the economics are the economics of survival. They don’t drive to work now and they won’t drive to work if gas hits $10 per gallon, or if it drops a buck.

Many, if not Most, Bike Commuters Simply Can't Afford the Motor Vehicle They'd Rather Have

So, is it Hopeless?
Of course not! Bike commuting, except for the desperately poor, is not driven by the cost of driving. That is reality. It will remain so for many years to come. However, that does not mean that bike riding can’t play a much more important role in our society and even reduce the costs our society pays to keep all those cars in streets and parking lots. Namely, we can foster the fun and safe aspect of riding to nearby stores and restaurants – “the one mile solution.” How can this be accomplished? I don’t know. I’m not an advocate, but I know things would be cheaper if all the stores I shop at didn’t have to use up so much land and effort to maintain giant parking lots. The good news is they wouldn’t have to buy any extra land at all to put in a bike rack at a prime spot near the front door, nor would they alienate cycling customers with a sign saying “bring your bike inside while you shop at Walgreens” or some such.

OR, we can encourage people to show their patriotism by the one mile solution. A bit different narrative and that miller guy could be riding a mile for his beer. He ain't doing it because gas is expensive. It's just what he can do to help his country and himself. It's a politically neutral, and positive approach. On the other hand, it MIGHT have the negative side effect of encouraging people to honk at innocent cyclists so maybe we ought to simply forget the whole thing.

Ride a Mile for a Miller