Reus is generally a safe city for solo female travelers. Like any place, basic safety precautions should be taken, especially at night, but locals are friendly and the city is well-policed. Crimes like pickpocketing or petty theft can happen, particularly in crowded areas or tourist spots, however, violent crime is quite low. Public transportation is reliable and safe to use, even at night. It's always important to remain aware of one's surroundings and use common sense when travelling alone.