Biel is generally a very safe location for travel. Its crime rates are quite low compared to other global cities, and it is generally safe to travel at night. However, as in any city, it is still wise to be mindful of your surroundings and personal possessions, particularly in crowded places or public transportation. Swiss people also tend to be very helpful and friendly towards tourists, making it a welcoming place for solo female travelers. It's a pretty pedestrian-friendly city with reliable and secure public transportation, making independent navigation easy.