The water tankers topping the list. They supply the dearest commodity water to millions, and are both the most sought for and the most dreaded... they are the menace of chennai roads. The long distance trucks follow close - and move similarly at unbelievable speeds. The rest of the traffic move out and make way for these contraptions. Then come the public transport - bus service. In the peak hours, these buses are loaded to dangerously full with a sideways tilt - always on the verge of toppling over these buses move preacriously at a tilt of 45 Degrees.
Then come the cattle. Thankfully these have now been forbidden from the most populus traffic areas, but in other places there will almost always be a drooling cow/ buffalo standing in the middle of the road refusing to move either way. The image here shows stray cattle innthe middle of a busy highway - GST Road