Editing Interstate 535 (section)

==History==
I-535 was authorized in 1957 as part of the original [[Interstate Highway System]].<ref name=IHS57>{{cite map |author= Bureau of Public Roads |url= http://commons.wikimedia.org/wiki/File:Interstate_Highway_plan_October_17,_1957.jpg |title= Routes to be Added to the National System of Interstate and Defense Highways |location= Washington, DC |publisher= Bureau of Public Roads |date= October 17, 1957 |access-date= September 18, 2011 |via= [[Wikimedia Commons]] }}</ref> The [[Blatnik Bridge]] was opened in 1961,<ref name=CL6981>{{cite web |author= District 1 Staff |title= Construction Log 6981 |url= http://www.dot.state.mn.us/roadway/data/reports/data/counties/county69/6981.pdf |publisher= Minnesota Department of Transportation |access-date= September 18, 2011 |archive-url= https://web.archive.org/web/20120914220942/http://www.dot.state.mn.us/roadway/data/reports/data/counties/county69/6981.pdf |archive-date= September 14, 2012 |url-status= dead }}</ref> and the ramps to I-35 were completed in 1971.<ref name=CL6980>{{cite web |author= District 1 Staff |title= Construction Log 6980 |url= http://www.dot.state.mn.us/roadway/data/reports/data/counties/county69/6980.pdf |publisher= Minnesota Department of Transportation |access-date= September 18, 2011 |archive-url= https://web.archive.org/web/20120914221003/http://www.dot.state.mn.us/roadway/data/reports/data/counties/county69/6980.pdf |archive-date= September 14, 2012 |url-status= dead }}</ref> I-535 and the Blatnik Bridge replaced a swinging toll bridge at generally the same location. That bridge existed from 1897 to 1962 and carried US&nbsp;53 from Connor's Point in Superior to Garfield Avenue in Duluth.<ref>{{cite news |last = Perrine |first = Matthew R. |date = May 18, 2007 |title = Discover Duluth: Interstate Bridge |url = https://www.duluthnewstribune.com/news/2012632-discover-duluth-interstate-bridge |work = Duluth News Tribune |access-date = September 13, 2020 }}</ref>

In November 2011, both MnDOT and WisDOT installed new signs to remind drivers that trucks over {{convert|40|ST|t}} [[gross vehicle weight]] cannot use the Blatnik Bridge; these vehicles will be rerouted to the nearby [[Richard I. Bong Memorial Bridge|Bong Bridge]]. According to the press release, permitted, overweight vehicles have been restricted from using the Blatnik Bridge since early 2008 when inspections showed that corrosion and time were starting to affect the structure. Transportation officials say that the bridge is aging, and restriction of overweight vehicles will help to extend the life of the bridge. Drivers who disregard the posted weight limits will be ticketed.<ref name=burns-2011-11-12>{{cite web |last= Burns |first= Krista |url= http://www.northlandsnewscenter.com/news/nw-wisconsin/Load-Limit-Signs-on-Blatnik-Bridge-134250238.html |title= Load Limit Signs on Blatnik Bridge |publisher= [[KBJR-TV]]/[[KDLH-TV]] |location= Duluth, MN |date= November 21, 2011 |access-date= December 10, 2011 |url-status= dead |archive-url= https://web.archive.org/web/20120524054901/http://www.northlandsnewscenter.com/news/nw-wisconsin/Load-Limit-Signs-on-Blatnik-Bridge-134250238.html |archive-date= May 24, 2012 }}</ref>