Want this question answered?
less than a 1000 feet
In daylight and good visibility, yes. Otherwise, no. In many places it is also illegal.
500
500 feet
You should dim your lights as soon as you see their lights.
1,000 feet
Not--100
when you see there lights you should dim yours
Within 500 feet of incoming traffic.
When you feel the need to slow down or stop... Brake lights are universally required to be used on all public roadways throughout the modern world. Many countries have adapted the 'Third' or center brake light for added visibility.
Not all busses do, you can look at many examples that they don't, but since apparently yours do, I would assume they are meant for visibility reasons, or for identifying a particular route, or bus.
Red light road sign