The bus could have been caught in a jam during morning and evening peaks, or when there is any accident or vehicle breakdown. The traffic conditions in and around campus play an important part in determining the bus arrival as campus roads are mostly single lanes and very narrow.
Bus bunching occurs usually during the peak periods when the frequency and departing times of the buses are very close. The high passenger loading at some bus stops may hold up the first bus and result in the subsequent bus eventually catching up with the first bus.
As the rear door of the bus is equipped with photocell sensor to prevent the door from closing on any passengers, the rear door will remain open until the area is cleared. Passengers are encouraged to avoid standing near the bus doors to reduce the dwelling time at the bus stops.
This is to allow more passengers to board the bus. There are fellow students who are also anxious to board the bus for their lessons/lectures as well.
It is likely be that the bus is already full or students standing near the entrance of the bus have obstructed the side view of the driver. It could also be that another bus is approaching.
As UTown is designed to be a green sustainable town that is conducive for students to walk freely around, there is no plan to extend the shuttle bus services within UTown. Due to the narrow single lanes, it will be congested when regular buses travel alongside the RCs. Noise pollution will also arise amidst the quiet RC environment during the peak period and at night too, bearing in mind that the ISB operation starts at 7.15am in the morning and ends at 11.00pm every night. This could cause disturbance to students requiring a restful evening, and especially disturbing during examination times. Extending the ISB within UTown will also lead to longer turnaround or travelling times.
The key reason for not stopping all 3 services in Kent Vale is to minimize noise disturbance and traffic congestion in Kent Vale. Should all 3 services be turning into Kent Vale, it would mean that there will be additional 11 buses/hour and 10 buses/hour entering Kent Vale during the peak and off peak hours respectively. The noise level will increase significantly in the event that all 3 services operate as per current schedule. In addition, the buses will likely create congestion within the road in Kent Vale.
ISB BTC is selected to serve Kent Vale stopping point for full day operations due to the following reasons:
- In comparison with passengers heading towards FoS or FASS/BIZ, there is no alternative service for passengers heading towards Bukit Timah Campus (BTC).
- ISB BTC can also serve passengers heading towards CLB, FASS and BIZ.
- ISB BTC has the highest ridership per trip compared to the ISB B and C.
The overall ridership for ISB BTC does not justify for an increase in frequency. The University may end up running empty buses to and from Bukit Timah Campus if the bus frequency is increased.
Prior to the implementation, detailed ridership surveys were carried out to understand the service demand at the Japanese School bus stop. It was observed that the average demand for ISB C decreases drastically after 1000hr. The low ridership does not justify for the service demand and increased traffic into KV. Those who pass by Kent Vale to come to NUS can hop onto the BTC bus.