Walk Score of Bikeable Area
Being able to bike to lots of amenities should increase your Bike Score. Suggest calculating the Walk Score of the area you can bike to and factoring that into the Bike Score.
Manton Frierson commented
A bike score, in general, should always be higher than a walk score - never lower - as several here have pointed out, it should be the "base" score for biking. A bike can travel farther and, in general, can use existing auto infrastructure safely, especially in suburban neighborhoods. Many more locations are within biking distance. Transit with bike racks are often available within a few miles. Bike lanes as used in the US are NOT necessarily safer, especially in urban areas where the bike lanes are "door zones" and include a seam between the asphalt and concrete which is inherently unsafe .....
I think this is the obvious way to start. It would be ridiculous not to use this as the base. To be clear, I mean to apply the walk score criteria to a larger area that reflects the increased speed of cycling.
Ville M commented
This is a good idea, u can get rought idea by turning on "bike lanes" in google maps, where u see larger area of green should improve scores in that area. Because what good is a tiny area of good bikability surrounded in a sea of bike hating cities/areas.
I think what he means is that most of the things that give a neighborhood a high WalkScore are the exact same things that give it a high BikeScore. In fact, BikeScore might be almost as simple as WalkScore with a larger radius.
I think you're saying:
1. Calculate a base bike score for a given location.
2. Calculate the walk score for any commerce center (strip mall, etc) within the biking radius.
3. Compute a final bike score using the results of #1 and #2 (and possibly others).
If this is what you meant, then yes, I agree with this 100%