Rahway is generally a safe destination for solo female travelers. While precautions should still be taken as with any city - both large or small, and it's advisable to avoid walking alone at night in less populated areas or where lighting is poor. Many travelers report feeling safe during both day and night, and refrain from flashing expensive belongings or appearing overly touristy. The locals are typically helpful and friendly. As always, trust your instincts and if something doesn't feel right, it's best to steer clear.