Beginning Friday night, cars will be driving up and down Federal Boulevard in celebration of the Mexican holiday Cinco de Mayo.Cruising and partying on Federal Boulevard has been a tradition for years. Thousands of people are expected to take part on Denver's west side, and Denver police want to make sure everyone plays it safe.Officers will be watching for those who hang out of cars, stand on cars or drive recklessly.Last year, police handed out more than 500 citations and made nearly 200 arrests."We are going to be aggressively and consistently writing citations for any violations, whether it be related to traffic violations or general city ordinances," said Detective Virginia Quinones, with the Denver Police DepartmentOn Friday and Saturday night, those who drive on Federal Boulevard, anywhere between West 38th Avenue and West Florida Avenue, will not be allowed to turn onto the side street unless they have identification to prove they live in the area.Drivers will be able to cross Federal at 38th and 23rd avenues, Speer Boulevard and Alameda, Mississippi, and Florida avenues.Denver police said they also will strictly enforce the teen curfew this weekend.That means those 17 and younger will not be allowed to stay out past midnight on Friday and Saturday nights or past 11 p.m. on Sunday.Droves of people also will be flocking to Civic Center Park this weekend. The Cinco de Mayo celebration is expected to draw 400,000 people, which would make it one of the largest festivals in the country. Streets in that downtown area will be closed until Monday at 6 a.m.Meantime, a Cinco de Mayo festival in Virginia has been canceled because organizers feared there would be a federal raid of illegal immigrants. The event founder said she called off the festival after getting a call from the Fairfax office of U.S. Citizenship and Immigration Services. The caller was interested in the event but wouldn't say why.