It is a question on the minds of many frustrated New Yorkers: Why has subway service gotten so bad, and what is being done to fix it?

The New York Times has been closely following the surge in subway delays and the Metropolitan Transportation Authority’s efforts to improve the system. Here are answers to some of the most commonly asked questions about the subway and links to our coverage of the problems.

Am I just unlucky, or is the subway really getting worse?

It is not in your imagination. Subway delays have soared in recent years. There are now more than 70,000 delays every month, up from about 28,000 per month in 2012. The system is fraying under record ridership, and trains are breaking down more frequently.