This factory class provides a default collection of
WayProperties that determine how OSM streets can be
traversed in various modes.
Circa January 2011, Grant and Mele at TriMet undertook proper testing of bike (and transit) routing, and worked
with David Turner on assigning proper weights to different facility types. The weights in this file grew organically
from trial and error, and are the result of months of testing and tweaking the routes that OTP returned, as well as
actually walking/biking these routes and making changes based on those experiences. This set of weights should be
a great starting point for others to use, but they are to some extent tailored to the situation in Portland and
people shouldn't hesitate to adjust them to for their own instance.
The rules for assigning WayProperties to OSM ways are explained in. The final tie breaker if two Pickers both match
is the sequence that the properties are added in this file: if all else is equal the 'props.setProperties' statement that
is closer to the top of the page will prevail over those lower down the page.
Foot and bicycle permissions are also addressed in OpenStreetMapGraphBuilderImpl.Handler#getPermissionsForEntity().
For instance, if a way that normally does not permit walking based on its tag matches (the prevailing 'props.setProperties'
statement) has a 'foot=yes' tag the permissions are overridden and walking is allowed on that way.
TODO clarify why this needs a separate factory interface.