The most obvious example would be the Penang bridge, altho it has been expanded to 3 lanes per side, but we can still see a lot of people blocking at fast lane and making other people overtake by using the 2 slow lanes to the left, it makes a weird scene for now that the 2 slow lanes to the left become our fast lanes. 
And for the people from Kedah, most of the people might drive slow and very careful but just without watching rear view mirror. On north-south plus highway, I figured out the most annoying car plates are K -> A -> P. Most of the cars with these 3 region plates are the slowest yet not willing to give way to faster cars at the back during my recent trip to KL and back. I'm sry, the above info is just my own 2cents and would like to share with autoworld forumers, not trying to offend any people from these 3 states(I'm from 2 of these region too
) but just hoping that every drivers around every state can be like KL drivers, maybe KL has the fastest cars in all over the country, so everybody has get used to be cautious and give way to faster cars from the back. What's your driving experience to another state?
