Abstract: A device for controlling industrial belt tracking with a first cylindrical pulley segment having a central opening and a plurality of teeth formed on the outside diameter; a second cylindrical pulley segment having a central opening and having a plurality of teeth formed on the outside diameter; and a flange ring. The flange ring being disposed between the first cylindrical pulley segment and the second cylindrical pulley segment such that the flange ring, the first cylindrical pulley segment and the second cylindrical pulley segment are coaxially aligned. Further, the flange ring is shaped and sized such that the outer diameter edge provides a flange perpendicular to the plurality of teeth formed on the outside diameter surface of the first cylindrical pulley segment and the second cylindrical pulley segment and generally radially aligned with the plurality of teeth formed on the outside diameter surface of the first cylindrical pulley segment and the second cylindrical pulley segment.

Abstract: A travel coordination system provides information to providers to reduce the wait time between trips. A region is partitioned into zones and generates a score for each zone. A zone score can be generated by estimating the wait time for the zone, which may be determined by a model for the wait time. The model for the wait time may use factors that contribute to the wait time, such as the number of providers in a zone and the trip request rate. The zone score for each zone is displayed to the provider on a road map of the geographic region. The travel coordination system also provides routes that use zone scoring to reduce the wait time for receiving an assignment request during travel to the destination. The travel coordination system identifies a destination and generates candidate routes to the destination. A route is selected based on route scores.