Arad is generally a safe place for solo female travelers. As with any travel destination, it's always advisable to maintain a sense of prior planning and vigilance. It's a peaceful city with a low crime rate. Most locals are helpful and polite. Although it is generally safe, like in any other place, avoid deserted areas and late-night walks alone. Always respect local customs and dress modestly. With general safety precautions, your visit should be smooth.