As someone who's navigated NYC solo countless times, the subway is generally safe but requires common sense precautions. Stay aware of your surroundings, especially late at night.

Choose middle cars during off-peak hours - they're usually more populated and closer to station master booths. Avoid empty cars even if they seem convenient.

Trust your instincts. If someone makes you uncomfortable, move to another car at the next stop. Most New Yorkers are helpful if you need assistance or directions. Highly recommend downloading offline maps as backup for navigation.