IRIS - Buay Chun Leh

lemon1974 SG

Need to clarify why I think the bus arrive 2min earlier (1908h instead of 1910h). When the bus arrive at the bus stop, I can sense that the bus was travelling at top speed. The bus continue to travel at top speed to BV. (enjoy that fast ride however).

So that's explain why the bus was 2min earlier. Or rather IRIS was not intelligent enoughto compute the correct speed the bus was travelling.

If such a system allows upto 5minutes in accuracy (tolerance) (due to traffic conditions on roads...), then IRIS in the first place should not have implemented.

I accept IRIS only if it can reply with up to +/- 1 minute tolerances.

+/- 1 min tolerance? i dun think this is possible... sometime the bus wait for the traffic light to turn green already 1 min plus already... road conditions are not that easy to control.. bus can be at the previous bus stop and if u use iris, it will show arriving at your bus stop, but then bus might come 5 mins later, for many reasons -- many ppl trying to board at previous bus stop, passenger asking for direction with BC, BC assisting PIW in boarding or alighting, or simply the bus cant move because it was stuck behind another bus at the bus stop. then got to wait at traffic light.. some time, have to wait longer especially those busy right turn junction..
if you are not happy with Iris, it is your choice not to use it. If not, maybe you can design a better system with 100% accuracy at lower cost than what SBST is paying..

SBS9888Y SG

if your not happy, dun use it. sometimes ppl are just plain stupid. they say this thing lousy lah, so useless, at the end they still use it.

choww SG

During CNY, while waiting at the bus stop opp far east plaza for 143, the LCD panel shows 33 minutes. Hoping it was not accurate, but was soooo accurate. It arrive 33 minutes later

SBS9888Y SG

During CNY, while waiting at the bus stop opp far east plaza for 143, the LCD panel shows 33 minutes. Hoping it was not accurate, but was soooo accurate. It arrive 33 minutes later

cny 143 only got 11 buses before sa su ku (T shift) starts which is from 530-800. once sa su ku comes in, 15 buses running until 3pm where the 2 P shift comes in and becomes 17 buses. it den drops to 13 buses after sa su ku keep at 5 plus pm. *crazy*

iamgoondu SG

I understands the constraints that may give rise to the 'inaccuracy' of the system, traffic conditions for instance. And all the points you bring up are valid, that is it is very difficult or rather impossible to come up with a IRIS system that can give a +/- 1 minute accuracy.

So my point is, if at the beginning, we are aware of the constraints that IRIS will not be a 'accurate' system, rather it can only provide an approximate time, why bother to come up with such a system? Anyway average waiting time for most buses will probably less than 10 minutes.

I appreciate having IRIS if average waiting time for most buses were 45 min / 1 hour however.

iamgoondu SG

As for the train, the approximate arrival time is good, because it provided a fairly accurate timing on the next arriving train.

To implement it for our train system is good, but it does not mean that the same 'approximate time' system is suitable to our buses as well.

lianamaster SG

As for the train, the approximate arrival time is good, because it provided a fairly accurate timing on the next arriving train.

To implement it for our train system is good, but it does not mean that the same 'approximate time' system is suitable to our buses as well.

Yea..because of the popular disclaimer for buses: 'Subject to traffic conditions...'

lemon1974 SG

this topic was featured in asiaone.com/mypaper.. show that outsider really read what we wrote also...
http://motoring.asiaone.com/Motoring/News/Story/A1Story20090421-136440.html
copyright of sph/asiaone.com

iamgoondu SG

This is my second time that a topic raise here was reported in SPH media. It feels good.

TIB537B SG

I believe the concept behind IRIS is a good one, because anyone who has a handphone can get the timing of the bus and plan their time.Not all systems are reliable sometimes. Although IRS unreliable at times, but if you want a precision that's unmatched i guess you'll really have to find that pyschic in the IRIS ad.

jayh272416 SG

Laughing nice one

« Previous Page