too many drivers either disconnect or modify them... anyway, our TP is useless. I remember an incident years back when I was riding on the expressway. I was traveling around ~110km/hr in a light drizzle when a bus overtook me in great speed on the 3rd lane. It was driving so fast that I did not even see it behind me when it overtook me. It cut very close to me that made my bike wobble and also other vehicles in front and continue to sped away.
I took down the details, time and license number. Made a report to TP and they told me I have to go down to TP HQ, make an oath and be ready to testify in court. I say yes and when I was there, the IO told me to drop the case.