Ontario | Hamilton, Ontario | The Wall Street Journal | Berlin Wall | Wall Street | University of Western Ontario | Progressive Conservative Party of Ontario | Kingston, Ontario | London, Ontario | Ontario Liberal Party | Windsor, Ontario | Lake Ontario | Ontario general election, 1995 | Scarborough, Ontario | Legislative Assembly of Ontario | Kitchener, Ontario | Premier of Ontario | Belleville, Ontario | Great Wall of China | Oakville, Ontario | Waterloo, Ontario | Member of Provincial Parliament (Ontario) | Northern Ontario | Hadrian's Wall | Burlington, Ontario | Wall Street Crash of 1929 | Ontario New Democratic Party | Royal Ontario Museum | Paul Wall | Sault Ste. Marie, Ontario |
400-series highway design has set the precedent for a number of innovations used throughout North America, including the parclo interchange and the modified Jersey barrier design known as an Ontario Tall Wall.
Lanes of opposing directions should always be separated either by a grass median, usually of sufficient width to prevent cross-directional collisions, to provide drainage, and may allow for future expansion, or an "Ontario tall-wall" concrete barrier if a grass median is not feasible (the tall wall is based upon the Jersey barrier but is not reinforced and higher at 1070-mm).