Maryland, is generally safe for solo female travelers. Just like any other place, certain locations can have higher incidences of crime, therefore, it's important to be aware of your surroundings. Most areas, especially tourist ones, are typically safe. Moreover, the locals are often helpful to tourists. Nonetheless, common sense safety precautions such as not displaying expensive belongings, being mindful of personal items, checking in with someone about your daily plans, and avoiding poorly lit or deserted areas at night should be considered. Public transport is efficient and reliable. Always trust your instincts and, if something doesn't feel right, remove yourself from that situation.