This goal has the following fine print specified by afcuttin:
Back in November 2014 I purchased a yearly subscription for the local public transportation service.
With this goal I want to count how many times I take the bus in the coming months, to see if it is worht the investment.
In general, I commit to use the public transportation whenever possible.
Every added unit corresponds to the (theoretical) usage of a one-hour-fare ticket.
If a ride is shared by car (for example, with a friend) a 0.5 point is added.
The final goal value corresponds to the minimum amount of fares (single fare is worth 1.2 €) that need to be rode to pay out the yearly subscription.