<div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> 
> secondary in most cases for the state<br>
highways and primary for the US ones.<br></blockquote><div><br></div><div> At least for the U.S., the Interstate vs. State Route distinction has more to do with funding than  carrying capacity and physical attributes. We have several State Routes that are definitely expressways: <a href="https://www.windy.com/-Webcams/United-States/Washington/Seattle/SR-at-MP-:-Des-Moines-Memorial-Dr/webcams/1459260132?47.545,-122.306,13">https://www.windy.com/-Webcams/United-States/Washington/Seattle/SR-at-MP-:-Des-Moines-Memorial-Dr/webcams/1459260132?47.545,-122.306,13</a></div><div><br></div><div>Although they are few, there are still portions of the Interstate that are not expressways:</div><div><a href="https://en.wikipedia.org/wiki/List_of_gaps_in_Interstate_Highways#Undivided_and_narrow_freeways">https://en.wikipedia.org/wiki/List_of_gaps_in_Interstate_Highways#Undivided_and_narrow_freeways</a></div><div><br></div><div>Michael Patrick<br></div><div><br></div><div><br></div><div> </div><br></div></div>