There are a number of bridges across the St Lawrence River , both where it forms the border between Ontario and New York State and to a lesser extent in the Province of Quebec where the river is wider. The previous twin steel girder bridges have now been replaced by a single cable-stayed bridge. There are numerous examples of impressive highway bridges throughout the USA and Canada. One example of a road with numerous such bridges is the road from Asheville, North Carolina to Marietta, Ohio . Various Railway Bridges Numerous railway bridges can be seen from adjacent highways.
Designs vary and some of the older steel girder bridges look somewhat precarious.
There are still a number of wooden trestle railroad bridges still in existence, but they tend to be small.