IELTS Grammar: correct the mistakes

Try to improve the following sentences.

1. It is clear that, the commuter numbers by car are dominant.
2. The number of passengers in train showed upward trend.
3. The number of commuters favor car and train significantly increase.
4. About average 5 million commuters traveled by car.
5. The figure for train started from about 2 millions.
6. British people continuously used more car than other vehicles.