Normal's Walkscore

According to the Walkscore website, Normal has a score of 48. That's only slightly better than the largest cities in Illinois, which have an average score of 46. A score of 48 is considered "car-dependent" (although it is close to the next category, "somewhat walkable").  The score is calculated using an algorithm that gives points for amenities within one mile (I guess that's how far they think someone is willing to walk to an amenity). So I guess the only way to improve the score is to build more amenities. Aren't we supposed to be encouraging people to walk more by making streets more pedestrian-friendly?