Would it be possible to include an iCal file attachment to the Access-A-Ride advance notification emails with a 30 minute window from the specified pickup time (that is the window in which Access-A-Ride drivers need to arrive)?
For example: if my Access-A-Ride is supposed to pick me up at 10:34 am from 1000 Broadway Ave and then again at 8:00 pm from 900 Jay St., include a calendar event (a .ics file) that would look similar to the following, attached to the advance trip notification:
BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
BEGIN:VEVENT
SUMMARY:Access-A-Ride Pickup
DTSTART;TZID=America/New_York:20130802T103400
DTEND;TZID=America/New_York:20130802T110400
LOCATION:1000 Broadway Ave.\, Brooklyn
DESCRIPTION: Access-A-Ride trip to 900 Jay St.\, Brooklyn
STATUS:CONFIRMED
SEQUENCE:3
BEGIN:VALARM
TRIGGER:-PT10M
DESCRIPTION:Pickup Reminder
ACTION:DISPLAY
END:VALARM
END:VEVENT
BEGIN:VEVENT
SUMMARY:Access-A-Ride Pickup
DTSTART;TZID=America/New_York:20130802T200000
DTEND;TZID=America/New_York:20130802T203000
LOCATION:900 Jay St.\, Brooklyn
DESCRIPTION: Access-A-Ride trip to 1000 Broadway Ave.\, Brooklyn
STATUS:CONFIRMED
SEQUENCE:3
BEGIN:VALARM
TRIGGER:-PT10M
DESCRIPTION:Pickup Reminder
ACTION:DISPLAY
END:VALARM
END:VEVENT
END:VCALENDAR
That way, Access-A-Ride customers on their smartphones or who use email + calendaring applications can include their pickups in their calendars and never be late for them!
The ics file described is in compliance with RFC 2445 although you can probably add the alarms in a more reliable way, I used the default VALARM but it doesn't seem to work everywhere.