This street are the busiest street with high volume of people.

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. The guideline to apply for the permit have changed. Under the new guideline, the street vendor applicants are can apply for the parking spot approval before applying for other necessary permits.
  2. The new guideline offer more protection and is fairer for the applicant.
  3. I do not want to rush into anything before I know which area has the busiest traffic.
  4. This street are the busiest street with high volume of people.

Are the above sentences correct?

2

I am not sure the meaning, but I can see some grammar mistakes in your sentences

  1. The guideline to apply for the permit HAS changed. ACCORDING TO/FOLLOWING TO the new guideline, the street vendor applicants CAN apply for the parking spot approval before applying for other necessary permits.
  2. high volume of people, I think you mean “the crowd” or “a crowd of people”
3
  1. The guidelines to apply for the permit have changed. Under the new guidelines, the street vendor applicants can apply for parking spot approval before applying for the other necessary permits.
  2. The new guidelines offer more protection and are fairer to the applicant.
  3. I do not want to rush into anything before I know which area has the busiest traffic.
  4. This street is the busiest street with the highest volume of people.

As usual, a number of errors are plural related and article related.