Ambala is generally safe for solo female travelers. Like many other places, it requires practicing general safety measures. The locals are quite friendly and it has a vibrant culture worth exploring. However, it would be advisable to avoid lonely streets and public parks after dark, and always be cautious of your belongings. Public transport is reliable and frequently used by local women, but shared taxis or rickshaws should be avoided late at night. Always trust your intuition and if a situation doesn't feel safe, remove yourself from it.