Assuming a willingness to commute for 30 minutes, there is a gradual decline in accessibility along a transit line. If a transit distance of 5 minutes is assumed between each stop, then the accessibility radius around the first stop (Ra) will include a 25 minute access time (walking, public transit, driving, cycling). Each subsequent stop implies a decline of this radius by a factor of 5 minutes. The last stop (e), which is 25 minutes away, would have a radius of 5 minutes. For instance, a commuter wishing to have a commuting time of 30 minutes or less would need to live within a radius of Rc to access stop c. Extending the willingness to commute time will extend the radius around each stop.