Editing Roundabout (section)

=== Mini-roundabouts ===
After developing the offside priority rule, [[Frank Blackmore (traffic engineer)|Frank Blackmore]], of the UK's [[Transport Research Laboratory]], turned his attention to the possibility of a roundabout that could be built at sites lacking room for a conventional roundabout.<ref name="Obit-Fank_Blackmore">{{cite news | url=https://www.theguardian.com/theguardian/2008/jun/21/6 | title=Frank Blackmore Determined, maverick traffic engineer who invented the mini-roundabout | work=[[The Guardian]] | date=21 June 2008 | access-date=7 October 2013 | last=Rhodes | first=Belinda}}</ref>
{{Gallery
| align        =right
| height       =113
| width        =200
| File:Small roundabout. Kargilik.jpg
 | <small>Small roundabout in [[Kargilik Town|Kargilik]], Xinjiang, China</small>
 | alt2=
| File:Germany, Sachsen-Anhalt, Südharz, Uftrungen (1).JPG
 | <small>Mini-roundabout in [[Uftrungen]], Germany</small>
 | alt3=
| File:mini-roundabout.jpg
 | <small>A mini-roundabout in the UK, where a painted white circle is used as centre. The arrows show the direction of traffic.</small>
 | alt1=
}}
[[File:Qatar, Simaisma (9), roundabout with shops.JPG|thumb|right|Roundabout in rural [[Qatar]]]]
Mini-roundabouts can incorporate a painted circle or a low dome but must be fully traversable by vehicles. Motorists can drive over them when there is no other traffic, but it is dangerous to do so otherwise. Once the practice is established it may be difficult to discourage. Mini-roundabouts use the same right-of-way rules as standard roundabouts but produce different driver behaviour. Mini-roundabouts are sometimes grouped in pairs (a double mini-roundabout) or in "chains", simplifying navigation of otherwise awkward junctions. In some countries [[road sign]]s distinguish mini-roundabouts from larger ones.

Mini-roundabouts are common in the UK, Ireland and [[Hong Kong]] (particularly on Hong Kong Island), as well as [[Irapuato, Guanajuato|Irapuato]] in Mexico.

In the UK and also in other jurisdictions that have adopted mini-roundabouts, to drive across the central disc or dome when it is practicable to avoid it is an offence. Vehicles are required to treat the painted circle as if it were a solid island and drive around it.<ref>{{cite web|url=http://www.direct.gov.uk/en/TravelAndTransport/Highwaycode/DG_070338|title=The Highway Code – Roundabouts|access-date=14 May 2009}} Section 188, referring to Road Traffic Act 1988, Section 36, and [http://www.opsi.gov.uk/si/si2002/20023113.htm Traffic Signs Regulations & General Directions 2002], Regulations 10(1) & 16(1)</ref> Some local authorities paint double white lines around the circle to indicate this, but these require permission from the [[Secretary of State for Transport]]. The central dome also must be able to be overrun by larger vehicles.

In the UK – and also in other highway jurisdictions – the maximum size (inscribed circle diameter) for a mini roundabout is 28 metres (30 yards).{{Citation needed|date=January 2025}}