Editing Speed limit (section)

==== Roads formerly without speed limits ====
Many roads without a maximum limit became permanently limited following the [[1973 oil crisis]]. For example, [[Switzerland]] and [[Austria]] had no maximum restriction prior to 1973 on motorways and rural roads, but imposed a temporary {{cvt|100|kph}} maximum limit in response to higher fuel prices; the limit on motorways was increased to {{cvt|130|kph}} later in 1974.<ref>{{cite web|url=http://www.astra.admin.ch/dokumentation/00119/00214/index.html?lang=en&download=NHzLpZeg7t,lnp6I0NTU042l2Z6ln1ad1IZn4Z2qZpnO2Yuq2Z6gpJCDeX94hGym162epYbg2c_JjKbNoKSn6A--|title=The duties of the Swiss Federal Roads Office - ASTRA - Bundesamt|quote=Outside of built-up areas: Prior to 1973: no restriction 1973: 100 km/h (provisional) 1977: 100 km/h (definitive) 1985: 80 km/h (trial) 1989: 80 km/h (definitive), national referendum on 26 November 1989 Motorways: Prior to 1973: no restriction 1973: 100 km/h (temporary), due to oil crisis 1974: 130 km/h (provisional) 1977: 130 km/h (definitive) 1985: 120 km/h (trial) 1989: 120 km/h (definitive), national referendum on 26 November 1989|year=2009|access-date=2010-10-26|archive-url=https://web.archive.org/web/20110706221556/http://www.astra.admin.ch/dokumentation/00119/00214/index.html?lang=en&download=NHzLpZeg7t,lnp6I0NTU042l2Z6ln1ad1IZn4Z2qZpnO2Yuq2Z6gpJCDeX94hGym162epYbg2c_JjKbNoKSn6A--|archive-date=2011-07-06|url-status=dead}}</ref><ref>{{cite web|url=https://oesv1.orf.at/stories/358361|title=Seit 35 Jahren Tempolimit auf Autobahnen - oesterreich.ORF.at|website=oesv1.orf.at}}</ref><ref>{{cite web|url=http://www.oeamtc.at/?id=2500%2C1136024%2C%2C|title=Willkommen &#124; ÖAMTC|date=2023-12-04}}</ref>
[[File:MONTANA-PR.svg|thumb|Typical speed limit sign that one would see at the Montana state line from December 1995 to June 1999]]
[[Montana]] and [[Nevada]] were the last remaining U.S. states relying exclusively on the basic rule, without a specific, numeric rural speed limit before the [[National Maximum Speed Law]] of 1974.<ref>{{cite web|url=https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1812&context=jtrp|title=The Development of a Speed Monitoring Program for Indiana (FHWA/IN/JTRP-98/19)|author=Darren L. Jorgenson|author2=Kumares C. Sinha <!--(Joint Transportation Research Program, Purdue University)-->|date=April 2000|access-date=2010-09-26|publisher=[[Indiana Department of Transportation]]|quote=CHAPTER 1: INTRODUCTION : 1.1 Background Information "Before 1974, Interstate highways through various states had different speed limits, except Montana and Nevada, which had none."}}</ref> After the repeal of federal speed mandates in December 1995, Montana was the only state to revert to the basic rule for daylight rural speed regulation. The [[Montana Supreme Court]] ruled that the basic rule was too vague to allow citation, prosecution, and conviction of a driver; concluding enforcement was a violation of the [[due process]] requirement of the [[Montana Constitution]].<ref>{{cite web|url=https://caselaw.findlaw.com/courts/Montana|title=FindLaw's MT case and opinions|website=Findlaw}}</ref> In response, Montana's legislature imposed a {{cvt|75|mph}} limit on rural freeways in 1999.<ref>{{cite web|date=1999-05-28|title=Sky no longer the limit on 'Montanabahn'|url=https://www.deseret.com/1999/5/28/19447938/sky-no-longer-the-limit-on-montanabahn|access-date=2022-04-18|website=Deseret News}}</ref>

Australia's [[Northern Territory]] had no rural speed limit until 2007, and again from 2014 to 2016. Sections of the Stuart Highway had no limits as part of an [[Speed limits in Australia#NT open speed limits|open speed limit trial]].<ref>{{cite web|title=The need for speed on Stuart Highway|publisher=Australian Broadcasting Corporation (ABC)|date=2013-10-15|url=http://www.abc.net.au/local/stories/2013/10/15/3869390.htm|access-date=2020-12-07}}</ref>