- 1 extra DD.
- 1 Service 983 DD will perform one (1) down-route trip from Choa Chu Kang Avenue 5 (Bus Stop 44589 - Opp Blk 489A) towards Choa Chu Kang Interchange before Weekdays AM Peak, departing at 0525 hours.
- 1 Service 983 DD will perform two (2) terminating trips as Short Trip 983A during Weekdays PM Off-Peak, departing Choa Chu Kang Interchange at 0005 hours & 0045 hours.
- 1 Service 983 DD will perform two (2) terminating trips as Short Trip 983A during Weekdays PM Off-Peak, departing Choa Chu Kang Interchange at 0025 hours & 0105 hours.
- 1 Service 983 SD & 2 Service 983 DDs will perform one (1) down-route trip from Choa Chu Kang Avenue 5 (Bus Stop 44589 - Opp Blk 489A) towards Choa Chu Kang Interchange before Saturdays AM Peak, departing at 0532 hours, 0525 hours & 0539 hours respectively.
- 2 Service 983 buses will perform two (2) terminating trips as Short Trip 983A during Weekends & Public Holidays PM Off-Peak.
- 4 Service 983 SDs & 2 Service 983 DDs perform one (1) down-route trip from Choa Chu Kang Grove (Bus Stop 44891 - APSN) towards Choa Chu Kang Interchange before Saturdays AM Peak, departing at 0542 hours, 0554 hours, 0600 hours, 0612 hours, 0548 hours & 0606 hours respectively.
- 9 Service 983 DDs will perform one (1) down-route trip from Choa Chu Kang Grove (Bus Stop 44891 - APSN) towards Choa Chu Kang Interchange before Weekdays AM Peak, departing at 0528 hours, 0533 hours, 0538 hours, 0543 hours, 0548 hours, 0554 hours, 0600 hours, 0606 hours & 0612 hours.
- Several Service 983 buses will
- perform one (1) down-route trip from Choa Chu Kang Avenue 5 (Bus Stop 44589 - Opp Blk 489A) towards Choa Chu Kang Interchange before Sundays & Public Holidays AM Peak, departing between 0525 hours & 0547 hours.
- perform one (1) down-route trip from Choa Chu Kang Grove (Bus Stop 44891 - APSN) towards Choa Chu Kang Interchange before Sundays & Public Holidays AM Peak, departing between 0543 hours & 0614 hours.
- Any 4 Double-decker buses will operate on Service 983 on Weekends & Public Holidays.
- SMB242D (KJDEP Spare Bus) & Random Service 61 SDs will operate on Service 983 on Weekends & Public Holidays.
- Random Service 983 DDs will operate on Service 975 on Weekends & Public Holidays.
- All Service 983 buses are deployed on a rotation basis.
- All Service 983 buses departing Choa Chu Kang Interchange after 2345 hours will operate as Short Trip 983A.
- All Service 983 MAN ND323F (3-Door) & Yutong ZK6125BEVGS buses are only deployed on Weekdays.
- Majority SD fleet on Weekends & Public Holidays.
- This service is introduced & extended under Land Transport Authority (LTA)'s Bus Service Enhancement Programme (BSEP).
- This service practises jumpbus.
- All Service 983 buses park at Bulim Depot (BUDEP).
- Weekdays: 7 AM - 8 PM / 8 S1 (14 buses)
- Saturdays: 7 AM - 10 PM / 1 S1 / 2 S2 (10 buses)
- Sundays: 5 AM - 10 PM / 1 S1 / 3 S2 / 1 TQ (10 buses)
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