King Abdullah Economic City in Saudi Arabia is relatively safe for solo female travelers. The city, known for its modern infrastructure and progressiveness, has been adopting a more liberal approach to Western standards in recent years. Women are no longer required to wear an abaya, although modest clothing is still advised. Safety should not be a major concern, with vigilant police presence and stringent security measures in place. That being said, it's always important to exercise common sense, respect local customs and stay aware of your surroundings.