Douai is generally a safe town for solo female travelers. Petty crimes like pickpocketing do occur, especially in crowded areas. It is recommended for travelers to be vigilant and cautious of their environment, especially during evenings. However, violent crimes are very uncommon. Local people are quite friendly and ready to assist. As a visitor, always ensure that you respect the local culture and norms. Public transportation and roads are safe to use. It is fairly safe to walk around during the day and night, though it is advisable to avoid deserted areas after dark.