lane roadway divided by a raised paved median, and passes north of a forest as it approaches a four-level interchange with the QEW. The five parclo ramps provide almost all directional movements, though the QEW off-ramps meet Highway 420 at at-grade intersections. These at-grade connections can be bypassed by a pair of connectors carried by a dual on-and-off ramp flyover that arcs over the CN rail line and the QEW Toronto-bound carriageway, directing Fort Erie-bound QEW traffic onto Highway 420 eastbound and westbound Highway 420 traffic onto the Toronto-bound QEW. Another set of ramps links Toronto-bound QEW traffic to Highway 420 eastbound and Highway 420 westbound to the Fort Erie-bound QEW. East of the QEW, Highway 420 encounters an interchange with Dorchester Road as both cross the Queenston-Chippawa Power Canal. This interchange was originally a traffic circle that was removed in the early 1970s. The numerous lanes from the QEW interchange to the west begin to converge between residential subdivisions east of Dorchester Road, gradually narrowing to four through lanes at the Drummond Road interchange. After passing beneath Portage Road, the route widens on approach to an at-grade intersection with Stanley Avenue. This intersection is the eastern end of both the freeway segment of the route and the signed King's Highway 420; east of Stanley Avenue the route is signed as Niagara Regional Road 420 and known as Falls Avenue. Now separated by a landscaped median, the route progresses eastward, intersecting MacDonald Avenue and providing access to several residential and retail properties that adjoin the road. The route travels within a concrete trench and abruptly curves to the southeast as it passes beneath Victoria Avenue, with which there is a simple interchange. East of this point, the road was named Newman Hill until March 2012. Palmer Avenue and Ontario Avenue pass over the route as it descends a hill towards the Niagara Gorge. At the bottom, the route curves to the southwest, where it provides access to the Rainbow Bridge border crossing into the United States as well as the tourist district of the city. Owing to its association with the number 420 in cannabis culture, Highway 420 is also the location for the annual Cannabis Conference and Protest, usually taking place sometime around April 20. The event includes a march beginning near Niagara Falls and travelling to Highway 420. History Rainbow Bridge Approach The history of Highway 420 predates