Bus Service Reliability Framework

News Releases 16 Jun 2014 Bus Service Reliability Framework (BSRF)

Early Signs that BSRF is Reducing Instances of Bus Bunching
and Prolonged Waiting Times


7 More Bus Services under BSRF from 23 June 2014 

1.        The Land Transport Authority (LTA) introduced a two-year trial of the Bus Service Reliability Framework (BSRF) in February 2014 to improve en-route bus regularity, and reduce instances of bus bunching and prolonged waiting times. Results from the first three months of the trial are encouraging.

2.        The trial was started with seven SMRT bus services. All four trunk bus services saw improvements in their Excess Wait Time (EWT1) compared to the 2013 baseline score. The performance of the feeder bus services were mixed.


EWT SCORE

 

BASELINE SCORE 2013(mins)

FEB 2014 (mins)

 

MAR 2014 (mins)

 

APR  20142 (mins)(Preliminary score)

SMRT  Trunk Bus Services

Service 176

1.6

1.3
(0.3 improvement3)

1.4
(0.2 improvement)

1.5
(0.1 improvement)

Service 184

1.3

1.0
(0.3 improvement)

0.8
(0.5 improvement)

1.0
(0.3 improvement)

Service 188

1.4

0.9
(0.5 improvement)

0.9
(0.5 improvement)

1.1
(0.3 improvement)

Service 858

2.1

1.6
(0.5 improvement)

1.6
(0.5 improvement)

1.9
(0.2 improvement)

SMRT  Feeder Bus Services

Service 901

0.9

0.7
(0.2 improvement)

0.5
(0.4 improvement)

1.0
(0.1 deterioration)

Service 911

1.3

1.2
(0.1 improvement)

1.3
(maintained)

1.5
(0.2 deterioration)

Service 302

1.0

1.1
(0.1 deterioration)

1.0
(maintained)

1.3
(0.3 deterioration)

3.        Eight SBS Transit bus services, which joined the BSRF trial in March and April 2014, also notched improvements across the board.

EWT SCORE

 

BASELINE SCORE 2013
(mins)

MAR 2014 (mins)

 

APR 2014 (mins)
(Preliminary score)

SBST Trunk Bus Services

Service 17

1.8

1.3
(0.5 improvement)

1.7
(0.1 improvement)

Service 52

2.0

1.3
(0.7 improvement)

1.7
(0.3 improvement)

Service 3

1.5

-

1.2
(0.3 improvement)

Service 39

1.2

 -

1.1
(0.1 improvement)

SBST Feeder Bus Services

Service 228

1.1

0.7
(0.4 improvement)

0.7
(0.4 improvement)

Service 242

0.8

0.5
(0.3 improvement)

0.7
(0.1 improvement)

Service 241

1.2

 -

1.0
(0.2 improvement)

Service 325

0.8

 -

0.6
(0.2 improvement)

4.        With a lower EWT score, the bus service would have fewer instances of bunching. As a result, commuters would experience more regular waiting times and greater ease in boarding as the passenger load is spread more evenly across the various bus trips.

5.       
Mr Yeo Teck Guan, LTA’s Group Director for Public Transport said, “The results of the BSRF trial are encouraging considering the buses have only been placed on the trial for a very short period. This is a significant change to bus operations, and an important step in improving commuters’ travel experience”.

6.       
From 23 June 2014, another seven bus services - SBS Transit Services 51, 154, 292, and 354, as well as SMRT Services 189, 853 and 962 - will be implemented under BSRF. This brings the total number of participating bus services to 22 in the two-year trial.


Incentives and penalties under BSRF

7.        From 1 June 2014, bus operators will be given incentives when they achieve improvements in bus service regularity, and penalised if there is deterioration in regularity.

8.Incentives and penalties will be determined based on 6-month average performance of each service. For every 0.1 minute improvement or deterioration in EWT score when compared to the baseline, the following monthly incentive and penalty quantum will apply. 

BSRF INCENTIVE & PENALTY AMOUNT

Fleet Size Category

1
(< 10 buses)

2
(10 to <20 buses)

3
(≥20 buses)

Incentive Amount
per 0.1 minute improvement per month

$ 2,000

$ 4,000

$ 6,000

Penalty Amount
per 0.1 minute deterioration per month

$ 1,300

$ 2,600

$ 4,000





1) The BSRF assesses the regularity of a bus service using the concept of Excess Wait Time (EWT). EWT is the average additional waiting time experienced by commuters at bus stops, compared to the scheduled waiting time if the buses arrived at regular intervals. Measured across all the trips and assessed at several bus stops, each bus service has its own existing baseline score, which is dependent on the historical performance and the characteristics of the service, such as the route length and en-route traffic conditions.

2) Preliminary score pending data verification.

3) An improvement in EWT score means the actual waiting time is closer to scheduled waiting time of a bus service. For example, the baseline score for Service 176 in 2013 at 1.6 minutes means that on average, commuters would have had to wait 1.6 minutes longer than the scheduled waiting time. In February 2014, the EWT score improved to 1.3 minutes longer than the scheduled waiting time, and this was an improvement of 0.3 minutes.
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