We plan to drive from Lisbon airport to Sintra. It's first week of january. I read about bad traffic between Lisbon and Sintra. According to Wiki, "IC19 (the highway from Lisbon to Sintra) is the most traffic-congested in Europe."
How long will it take to get to Sintra? one hour? two hours? Is it difficult to find a public parking in town once we arrive Sintra?