你写了一封信说你要在暑假的时候来纽约,现在就让我介绍一下纽约的交通情况用英语怎么说

You said that you want to have a summer holiday in NEWYORK in the letter you had sent,now let me introduce the traffic condition here.

You told me in a letter that you would visit New York in the Summer Holiday.
Now I let you know something about the transportation system in New York.