Trains are prone to delays and are often affected by deficient signaling, ageing infrastructure, and poor maintenance. Derailments and overcrowding can occur, increasing the risk of becoming a victim of criminal activity, including petty crime and assault. Local buses in Colombia are equally as dangerous. Overcrowding, poorly maintained vehicles and driving at excessive speeds have resulted in multiple road traffic incidents in recent years. Public transportation anywhere in Colombia is not recommended due to the increased risk to personal security.