The M0 motorway is a ringroad around Budapest, the capital of Hungary. The ring presently connects motorways M1, M7, M6, M5, M4, M3, M2, connecting currently to Highway 11. The southern section (between M1 and M5) of the ringroad currently does not comply with formal motorway specifications.
The 29 kilometre long section between M1 and M5 is the oldest section of the M0 motorway, and currently doesn't comply with formal motorway specifications. Speed limit on this section is 80 km/h. A new interchange
with the new M6
motorway was opened in September 2008.
The section between Highway 51 and M5 is to be renamed Highway 51 when a newly constructed and more southern section between both roads directly connects the old section to the new M5-M4 section of the M0. M0 currently shares a section with M5 and this shortcut will eliminate this shared section. This is currently scheduled for 2010. In the same year the southern section is to be upgraded to a six lane motorway. The section at the intersection with M6 is already six lanes wide .
The 12 kilometre long section between M5 and the initial section of the future M4 was completed in 2005. Maximum speeds on this section are 110 km per hour.
The 26 kilometre long section between the future M4 and M3 was completed in September 2008.
M3-Megyeri Bridge section
The 7 kilometre long section between M3 and the Megyeri Bridge
was opened before it connected to the rest of the M0 and was known as Highway 2/B and Highway 2/A. Both 2/B and 2/A are four lane highways, but Highway 2/A doesn't feature a median between the lanes. Maximum speeds on Highway 2/A are 80 kilometers per hour. It was renamed to M0 when the M5-M3 section was completed. Also opened in September 2008, the Megyeri Bridge
, opened in September 2008, further connects M0 to Highway 11.
Highway 11-Highway 10 section
The 9 kilometre section between Highway 11 and Highway 10 is planned and is scheduled for completion in 2014.
Highway 10-M1 section
The 18 kilometre remaining section between Highway 10 and the oldest part of the M0 beginning at the M1 interchange is planned for the future. No construction schedule is known so far, and it not expected to be constructed in the near future due to environmental concerns.
Between 2001-2006 an archeological site of great scientific importance was unearthed when building the southeastern sector of the M0 motorway.