What is " no traffic zone" in English?

Yes, although it might mean some place in which bicycles are allowed, so that not everyone may be walking. If you don't mind, i am going to correct the sentence in which you asked your question. It might read better as two sentences:

"I don't know the meaning of 'no traffic zone' in English. Does it mean a place where you cannot use vehicles, but where you must walk?"

I'm glad you correct it. Thank you.
I'm a little hasty as my exam will begin in 9 hours.

no, 16 hours.

I think you'll do well, your English is not bad, and it has been improving. The important question is how well does the examiner speak English.

The examiners of IELTS are all native speakers.
For you, is IELTS more difficult than TOFEL or visa verse?

As i am a native speaker of the American language, i was not obliged to take any such tests for university admission or to enroll in graduate courses. I have tutored ESL students, and i have helped friends to prepare for the TOEFL--but i am not familiar with the content of the test.