Question

Difficulty: HardKey Details and Schedules

Transcript of Public Announcement:

'Attention all passengers at the Central Intermodal Station. Please note the following urgent schedule and platform adjustments due to ongoing electrical maintenance along the northern corridor:

First, the Express Line 402 to Valencia, originally scheduled for departure at 14:15 from Track 3, is delayed by 45 minutes and has been relocated to Track 7. Boarding for passengers with priority access will commence 15 minutes before the updated departure time.

Second, Coastal Regional Train 108 to Alicante will depart on its original timetable at 15:00, but passengers must board exclusively from Lower Platform B due to track work on the main concourse.

Third, the High-Speed Shuttle 220 to Seville, which was operating on a tentative 30-minute delay from its 14:30 slot, has had its delay reduced to 10 minutes, departing from Track 12. Note that general boarding closes strictly 5 minutes prior to actual departure.

Finally, the Mountain Commuter Line 55 to Cuenca is cancelled until 17:00. Passengers holding tickets for the 14:45 service should report immediately to Customer Service Desk 4 in the West Wing to collect shuttle vouchers for buses departing at 15:30.'

Based on the announcement transcript, match each transit service or passenger group with its correct updated operational status and boarding requirement.

  • Express Line 402 Priority PassengersMust begin boarding at 14:45 at Track 7 following a 45-minute delay from the original 14:15 departure.
  • Coastal Regional Train 108 PassengersMust board at Lower Platform B for an on-time departure at 15:00 despite concourse maintenance.
  • High-Speed Shuttle 220 General BoardingMust complete boarding by 14:35 at Track 12 for a service departing 10 minutes past its original 14:30 schedule.
  • Mountain Commuter Line 55 (14:45 Service) Ticket HoldersMust report to Customer Service Desk 4 to receive alternative ground transport departing at 15:30.

Answer

Express Line 402 Priority Passengers match with boarding at 14:45 at Track 7; Coastal Regional Train 108 Passengers match with boarding at Lower Platform B for a 15:00 departure; High-Speed Shuttle 220 General Boarding matches with closing boarding at 14:35 at Track 12; Mountain Commuter Line 55 Ticket Holders match with reporting to Customer Service Desk 4 for replacement ground transport at 15:30.
Each pair correctly accounts for time math (adding delays to original departure times and subtracting boarding intervals), platform reassignments, and cancellation contingencies detailed in the public announcement.

Step-by-Step Solution

1
Calculate the updated departure and priority boarding time for Express Line 402.
Original time 14:15 plus 45-minute delay yields a 15:00 departure on Track 7. Subtracting 15 minutes for priority boarding yields a start time of 14:45.
Accurately applying additive delays and subtractive pre-boarding windows from the announcement.
2
Identify departure time and location constraints for Coastal Regional Train 108.
Departs on time at 15:00 specifically from Lower Platform B.
Extracting location-specific modifications when the schedule remains unchanged.
3
Calculate the actual departure and boarding deadline for High-Speed Shuttle 220.
The initial 30-minute estimate was reduced to a 10-minute delay, establishing a 14:40 departure from Track 12. Boarding closure 5 minutes prior establishes the 14:35 deadline.
Resolving revised delay announcements and strict pre-departure gate closures.
4
Determine the contingency protocol for Mountain Commuter Line 55.
The rail run is cancelled until 17:00, requiring 14:45 passengers to collect vouchers at Desk 4 for a 15:30 bus replacement.
Differentiating between route delays, track changes, and full cancellations with alternative transit arrangements.

Key Concept

Synthesizing schedule calculations, pre-boarding intervals, revised delay estimates, and transit contingencies from complex public announcements.
Estimated Time:2m 0s
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