A dangerous confrontation unfolded during a snowstorm Tuesday evening when a truck driver, apparently frustrated by gridlocked traffic, rammed a passenger car on an icy roadway, triggering a chain reaction crash and further chaos during the evening commute. According to police, heavy snowfall and slick conditions had slowed traffic to a crawl when the truck struck the rear of a sedan that had stopped ahead. The impact pushed the car into another vehicle, blocking multiple lanes as snow continued