<div dir="ltr">I've also been researching this with some local traffic engineers / road fans. There are still instances of this sign being posted, mostly on dirt roads where the DOT does not want tracked vehicles like bulldozers--or tanks--to drive them.<div><br></div><div>That said, I don't see an applicable access restriction for tracked vehicles on the OSM access tagging list.</div><br><div class="gmail_quote"><div dir="ltr">On Wed, Dec 2, 2015 at 1:35 AM Greg Morgan <<a href="mailto:dr.kludge.gm@gmail.com">dr.kludge.gm@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Dec 1, 2015 at 8:45 AM, Harald Kliems <span dir="ltr"><<a href="mailto:kliems@gmail.com" target="_blank">kliems@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div>Very useful, Simon. Thanks!</div><div><br></div>Slightly OT: Can anybody explain what R5-5, "No vehicles with lugs" means? I'm assuming it doesn't refer to vehicles like this <a href="http://3.bp.blogspot.com/_MyBrrEGexIg/TEIogw5nrdI/AAAAAAAAAFk/Jl7SF5tfQV0/s1600/L9990154.JPG" target="_blank">http://3.bp.blogspot.com/_MyBrrEGexIg/TEIogw5nrdI/AAAAAAAAAFk/Jl7SF5tfQV0/s1600/L9990154.JPG</a> <span><font color="#888888"><div><br></div></font></span><div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><span><br></span></blockquote></div></div></div></blockquote><div><br></div></div></div></div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>You made me look...</div><div><br></div><div><span style="font-size:12.0036px;outline:0px;font-family:Georgia;margin:0px;padding:0px;color:rgb(0,0,0)"><span style="font-size:12.0048px;outline:0px;margin:0px;padding:0px"><p style="font-size:15.006px;outline:0px;font-family:Georgia,serif;margin:0px 0px 1.48em;line-height:1.48em">In the early years of the 20th century, hard-surface roads often had signs that read: “Tractors with Lugs Prohibited.”</p></span></span><span style="color:rgb(0,0,0);font-family:Georgia;font-size:12.0024px"></span><span style="font-size:12.0036px;outline:0px;font-family:Georgia;margin:0px;padding:0px;color:rgb(0,0,0)"><p style="font-size:15.0045px;outline:0px;font-family:Georgia,serif;margin:0px 0px 1.48em;line-height:1.48em">Those early tractors were built with steel wheels covered with piercing lugs that gouged every surface. I remember the signs on U.S. 63 south of Stewartville to Racine and then on Minnesota Highway 16 going west to Grand Meadow.</p></span><span style="color:rgb(0,0,0);font-family:Georgia;font-size:12.0024px"></span><span style="color:rgb(0,0,0);font-family:Georgia;font-size:12.0024px"></span><div style="font-size:12.0036px;outline:0px;font-family:Georgia;margin:0px;padding:0px;color:rgb(0,0,0)"><div style="font-size:12.0048px;outline:0px;margin:0px 10px 0px 0px;padding:0px;float:left;max-width:310px;width:300px"></div></div><div style="outline:0px;margin:0px;padding:0px"><p style="color:rgb(0,0,0);font-family:Georgia,serif;font-size:15.0045px;outline:0px;margin:0px 0px 1.48em;line-height:1.48em">By the late 1930s, tractors finally were being built with rubber tires that still gave field traction and speed, sometimes up to 20 mph on the road.</p><p style="color:rgb(0,0,0);font-family:Georgia,serif;font-size:15.0045px;outline:0px;margin:0px 0px 1.48em;line-height:1.48em">...</p><p style="outline:0px;margin:0px 0px 1.48em"><font color="#000000" face="Georgia, serif"><span style="font-size:15.0045px;line-height:22.2067px"><a href="http://www.postbulletin.com/news/local/tractors-with-lugs-were-dangerous/article_580aa04a-5d73-5de1-8139-7b402a63ba90.html" target="_blank">http://www.postbulletin.com/news/local/tractors-with-lugs-were-dangerous/article_580aa04a-5d73-5de1-8139-7b402a63ba90.html</a></span></font><br></p><p style="outline:0px;margin:0px 0px 1.48em"><font color="#000000" face="Georgia, serif"><span style="font-size:15.0045px;line-height:22.2067px"><br></span></font></p></div></div></div></div></div>
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</blockquote></div></div><div dir="ltr">-- <br></div>Elliott Plack<br><a href="http://elliottplack.me">http://elliottplack.me</a>