No, smoking is strictly prohibited on all Frecciarossa trains and within the entire Trenitalia network in Italy. This ban includes not only traditional cigarettes and cigars but also e-cigarettes and vaping devices. The policy is enforced across all classes of service, from Standard to Executive, as well as in the restaurant cars and bathrooms. Italy has some of the strictest public smoking laws in Europe, and lighting up on a high-speed train can result in significant fines and being removed from the train at the next station. Furthermore, smoking is generally banned on the station platforms themselves, except in very specific, clearly marked outdoor "Smoking Zones" that are increasingly rare. If you are a smoker embarking on a long journey, such as the 3-hour trip from Rome to Milan, you will need to wait until you have completely exited the station at your destination. The smoke detectors on these modern trains are extremely sensitive and are linked directly to the train's safety systems to prevent fire hazards at 300 km/h.