變更

| isbn = 0-919783-84-8}}</ref>，沿途慢慢登上尼亞加拉懸崖，在史丹利大道（{{lang|en|Stanley Avenue}}）以東達致沿線最高點。公路沿途主要經過森林，而沿線主要聚落只得昆士頓村<ref name="toporama" /> 。

405號公路西端在[[濱湖尼亞加拉]]西南部從QEW分支，往東延約1.5公里，之後稍往東南拐。來回方向行車線在西端以寬闊的草坪分隔，草坪之後逐漸收窄 至{{convert|15|m|ft}} 至15公尺（49英尺） 濶<ref name="toporama">{{cite map |title = Canadian Topographic Atlas - Highway 405 |author = Toporama |publisher = Ministry of Natural Resources Canada |url = http://atlas.nrcan.gc.ca/site/english/maps/topo/map?layers=nodata_ntdb_50k%20north_arrow%20other_features%20million_grid%20t50k_grid%20roads%20hydrography%20boundary%20builtup%20vegetation%20populated_places%20railway%20power_network%20manmade_features%20designated_areas%20water_features%20water_saturated_soils%20relief%20contours%20toponymy%20contour&scale=40000.000000&mapxy=1315180.5572053108%20-493633.9137385053&map_layer&91;northarrow&93;_class&91;0&93;_style&91;0&93;=ANGLE%20-14.33157017424027&mapsize=525%20466&urlappend= |accessdate = June 10, 2010 |deadurl = yes |archiveurl = https://web.archive.org/web/20121003075627/http://atlas.nrcan.gc.ca/site/english/maps/topo/map?layers=nodata_ntdb_50k%20north_arrow%20other_features%20million_grid%20t50k_grid%20roads%20hydrography%20boundary%20builtup%20vegetation%20populated_places%20railway%20power_network%20manmade_features%20designated_areas%20water_features%20water_saturated_soils%20relief%20contours%20toponymy%20contour&scale=40000.000000&mapxy=1315180.5572053108%20-493633.9137385053&map_layer&91;northarrow&93;_class&91;0&93;_style&91;0&93;=ANGLE%20-14.33157017424027&mapsize=525%20466&urlappend= |archivedate = 2012年10月3日}}</ref><!-- Note that it is possible to zoom far beyond the limit by changing the value of scale=40000.000000 in the url to a lower number--><ref>{{Google maps  | title = Route of Highway 405 | url = http://maps.google.com/maps?f=d&source=s_d&saddr=ON-405+E&daddr=43.153395,-79.130276&hl=en&geocode=FdZxkgIdPElI-w%3B&mra=mi&mrsp=1,0&sz=16&sll=43.151834,-79.134758&sspn=0.008406,0.022702&ie=UTF8&ll=43.151129,-79.133706&spn=0.016813,0.045404&t=k&z=15 | accessdate = June 10, 2010}}</ref> [4][5] ，其後短暫進入[[尼亞加拉瀑布城 (安大略省)|尼亞加拉瀑布城]]境内並與史丹利大道（尼亞加拉區102號區道）交匯。這是405號公路沿途唯一一個交匯處；從此處起東行交通必須跨越劉易斯頓-昆士頓橋前往美國。公路在史丹利大道以西改以護欄分隔並擴濶至五線行車（三線東行、雙線西行），以配合排隊過關的貨車車龍<ref name="construction">{{cite journal

當局於2004年改建公路的東端以便貨車排隊過關<ref name="construction" /> ：工程包括從史丹利大道交匯處起增設一條東行線，以及逐步拆除尼亞加拉園林路交匯處<ref>{{cite report