We took both routes 1 and 2 and found ourselves in very congested traffic in both cases. The recorded tour information seemed out of sync to what we were viewing most of the time.
Tours and Tickets by Madrid City Tour
Visit up to 37 of Madrid’s top sights with a 1- or 2-day, hop-on hop-off bus ticket that lets you see the city your way. Board the double-decker, open-top bus and set off on Route One, Route Two—or both. Learn about Madrid’s history using a complimentary, onboard headset. Disembark to visit museums, landmarks, plazas, and theaters, and explore the Spanish capital using the guidebook and map provided.