Did you know LTA gives bus arrival times down to the second? Neither did I, until I poked around at LTA's DataMall API. They politely ask developers to round down to the nearest minute and slap "Arr" on anything under a minute away — but where's the fun in that?
So here it is, the full, unadulterated, LTA-provided second-by-second data: Highly Precise But Probably Inaccurate Bus Timings.
Disclaimer: this tool is for entertainment only. The developer — and, speaking unilaterally on their behalf, LTA — accepts no responsibility for any losses, damages, or liabilities that may result from the use of this joke of a website. If you sprint for a bus with seconds left and it's already gone, that's on you.