Salaah on a Conveyance

Q: Is it OK to pray dhur and Asar prayers while sitting in the car because I work at that time and I have short time by 4:15 to end my work and currently maghrib starts at 4:30p.m. Please Advise.

Q: Should I perform my namaz on the train if it is namaaz time?

Q: I have a question regarding a person travelling through different time zones? How does one go about determining what Salaah to perform when if they are travelling from one time zone to another? For example a person intends to travel from New York city to India. A person travelling from New York city to India or a surrounding country will have lost a day in this journey. I am writing a more clear example related to my question, please kindly advise me.

I board the airplane after performing Esha salaah in New York city, it will travel via Dubia to India. When I arrive to Dubia/India, I will have lost a day. My questions are as follows:

1. Whilst the plane is in the air, what salaah do I perform (bear in mind that I performed my esha before boarding in New York city)?
2. How do I calculate the salaah times since the plane will be travelling over different countries and time zones?
3. Can a person perform salaah whilst they are seated in their seats even though they have ability and facility to perform it in normal position in the plane?

Any other clarification or explanation or additional information will be appreciated concerning this question.

Q: If I am travelling and the time of prayer is finishing and there is no way the bus can stop, can I pray in the bus only? Please explain in detail.

Q: In the aeroplane I think it is very inconvenient firstly for myself, secondly for the passengers and thirdly for the air hostesses if I read namaaz standing, can I read it sitting?

Q: Mufti saheb, what's the status of performing salaah on a bus?