Lights on top of buses?

• JoeRaj

  10 Dec 12, 16:05

  Hello guys, I have had this question for at least 35 years, and until now, I havent found the answer. (Not that I have asked it a lot)

  But I now realsie that you good ppl, will most probably be able to answer them for me.

  You know all buses, esp double deckers, have these 2 small lights at either sides on the top of the buses. Some hv it at the back as well, these 2 purple, pink or red lights (usually) near the roof.

  What are they for? Surely it can be a warning of it's height or is it? Even newer buses have them. It cant be for the drivers to see heighst either, the lighst are too small and ineffective, so what are they for?

  Any clues? Thanks

• FireIce

  10 Dec 12, 16:12

  for 飞机 drivers 

   

  or ppl hiding in trees

• Mr Milo

  10 Dec 12, 16:15

   

  the lights are there to shoot lasers at birds who have taken a fancy to the bus

• SBS6060M

  10 Dec 12, 16:19

  Originally posted by Mr Milo:

   

  the lights are there to shoot lasers at birds who have taken a fancy to the bus

  light sabers to shock aliens.

• JoeRaj

  10 Dec 12, 16:36

  Originally posted by Mr Milo:

   

  the lights are there to shoot lasers at birds who have taken a fancy to the bus

  I like this answer!!

• TIB 501 D

  10 Dec 12, 17:16

  Originally posted by Mr Milo:

   

  the lights are there to shoot lasers at birds who have taken a fancy to the bus

  Cos later the birdz will defacate on top of the bus...

• TIB1218R

  10 Dec 12, 19:01

  Originally posted by Mr Milo:

   

  the lights are there to shoot lasers at birds who have taken a fancy to the bus

  
  
• SBS2656X

  11 Dec 12, 08:36

  No light = what happened to SBS9400X just that it is night time.
  
  Yeap, you've guessed it. That Volvo Olympian that became a single deck whilst on service 87. Some dead.

• vicamour

  16 Dec 12, 15:56

  For warning purposes.

• JoeRaj

  21 Dec 12, 11:52

  Originally posted by vicamour:

  For warning purposes.

  Yeah I know but to warn what?

• smokey the bear

  23 Dec 12, 23:39

  i think its is to indicate the height/clearance at night

• vicamour

  24 Dec 12, 13:05

  Originally posted by JoeRaj:

  Yeah I know but to warn what?

   

  Originally posted by smokey the bear:

  i think its is to indicate the height/clearance at night

  
  Hope you got your answer. It is more of a height warning at night.

  Especially for low flying aircrafts flying in open areas. Not really applicable in urbanised Singapore but just as a safety precaution.

  More common for tall vehicles in USA, Australia, Europe and other parts of Asia.

• Mr Milo

  24 Dec 12, 21:03

   

  yes, the height warning is the true answer

  most tall buildings if u notice, they have this light (always red) installed on the corners or the top of the buildings

  at night, they light up, warning low flying aircraft of such hazards

  of couse, these lights are unable to warn birds though