Traffico is short for Traffic Observer. It monitors bus arrival times to infer traffic conditions.
Hello. My name is Sing Tat. I use bus apps to check bus arrival times. Occasionally, I miss the bus by a few seconds or I end up waiting a couple of minutes more. Curious, I analysed the bus arrival times available at LTA DataMall to look for clues.
In summary, I found some explanations but interestingly, I also found a way to quite accurately calculate the estimated journey times between bus stops using (backdated) arrival times. Using these data and adding some algorithms, I am able to build Traffico.
Developers who are keen to determine the speed of traffic along roads should check out LTA’s Traffic Speed Band API. This API allows you to query the current traffic speeds on roads, expressed in speed bands. I knew about this API but I still proceeded to build Traffico as an exercise. Just a note, from the current documentation (API User Guide dated 6 Oct 2017), I have no way to determine the unique ID of roads required for this API and I have given my feedback to LTA.
Does it work
It’s not perfect but generally yes. It takes a while for the system to react to actual changes on the ground because we are monitoring buses and updates are possible only when buses arrive at stops (usually every 3 to 15 mins).
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