Ploiesti is generally considered safe for solo female travelers. Just like any other destinations, there is some crime, but they tend to be non-violent petty crimes such as pickpocketing. Stay alert, avoid less busy areas late at night and always secure your belongings. The people you meet are usually friendly and helpful. As precautionary measures, always share your itinerary with someone you trust, have emergency numbers at hand, and try to familiarize yourself with the local customs and language. But overall, the safety level in Ploiesti is fairly high as it is a peaceful area with locals who are respectful to travelers.