Public Transportation Problem

There is a problem regarding public transportation in where I live at the moment. (Can I just say "There is a problem in the public transportation?) The train that is used to go directly to the city center doesn't go there anymore for some reason. I have heard that there is some constructions going on somewhere near the central station. However, I have to go to the airport to pick up my sister today. I was supposed to go there by the train that I used to take, but due to the problem, I am looking for a new way to get there. It is a bit stressful since I am kind of lost and I am not familiar with the other transportation options here. My sister must be tired by the time she arrives in Frankfurt, so I might take a taxi if the problem is not going to be sorted out.

This is really good, you just need to work on using words that help it sound more natural. Your just missing a couple of words, but I got the meaning of you wrote. Keep it up!

Public Transportation Problem

There is a problem regarding public transportation in where I live at the moment. (Can I just say, "There is a problem in public transportation?.) The train that used to go directly to the city center doesn't go there anymore for some reason. I have heard that there is some constructions going on somewhere near the central station. However, I need to go to the airport to pick up my sister today. I was supposed to go there ridding the train I used to take, but due to the problem, I am looking for a new way to get there. It is a bit stressful since I am kind of lost and I am not unfamiliar with the other types of transportation here. My sister should be tired by the time she arrives in Frankfurt, so I might take a taxi if the problem is not going to be sorted out.

Wow, this was nicely written, HyunWook. You have improved a lot.

• "My sister should be tired...". It's should because she might or might not be tired. If you use must, then that's your opinion regarding if she's tired or not due to the trip.