AMSTERDAM (AP) — A group of cyclists slams on the brakes as a man pushing a wheeled suitcase stops abruptly in the middle of a busy bike path in downtown Amsterdam to pick up a toiletries bag he dropped. "If we wait a bit longer, he'll probably start cleaning his teeth," one rider says to his neighbor, humor failing to mask his frustration. It's a scene that is emblematic of the problem of overtourism that is clogging the streets of cities like Amsterdam, Rome, Barcelona and Venice. The Dutch capital, with its World Heritage-listed canals, narrow streets and web of alleys in its red light district, is now pushing back in an attempt to keep the city attractive to visitors and residents alike.