Question: How long is the road the A12 is a part of?

Passages:
The A8 is a national road in Latvia connecting Riga to Lithuanian border (Meitene), through Jelgava, also known as Jelgava highway in Latvia.  The road is part of European route E77 and Latvian TEN-T road network.  After the border, the road turns into Lithuanian A12.  The length of A8 in Latvian territory is 76 kilometers.  Currently A8 has 2x2 lanes until Jelgava bypass, other parts have 1x1 or 2x1 lanes.  The current speed limit is 90 km/h.  Plans to reconstruct A8 in to an motorway have been many.  First, in 2004, then in 2010, but they never started due to financial reasons.  In the recent years A8 has been reconstructed in many stretches.  The average AADT on A8 in 2015 was 13,711 cars per day. East Cross Route (ECR) is a dual-carriageway road constructed in east London as part of the uncompleted Ringway 1 as part of the London Ringways plan drawn up the 1960s to create a series of high speed roads circling and radiating out from central London.  The road was constructed between 1967 and 1973 and runs from Hackney Wick in north-east London, through the Blackwall Tunnel, to Kidbrooke in south-east London.  The ECR was initially designated as part of the A102, but has, subsequently, been partially renumbered so that sections of it are now the A2 and A12. Bow Road is a thoroughfare in Bow, Tower Hamlets, London, England.  The road forms part of the A11, running from Aldgate to Norwich in Norfolk.  To the west the road becomes Mile End Road, and to the east is Bow Interchange on the A12. The A12 is a major road in England.  It runs north-east /south-west between London and the coastal town of Lowestoft in Suffolk.  A section of the road between Lowestoft and Great Yarmouth became the A47 , and this forms part of the unsigned Euroroute E30 (prior to 1985 it was the E8).  Unlike most A roads, a significant portion of the A12 (together with the A14 and the A55) has junction numbers as if it were a motorway. The M11 link road protest was a major anti-road protest in Leytonstone, London, United Kingdom, in the early to mid-1990s opposing the construction of the "A12 Hackney to M11 link road", also known as the M11 Link Road, which was part of a significant local road scheme to connect traffic from the East Cross Route to the M11, avoiding urban streets. Ipswich Road, formally the A1232, is a road in Colchester, Essex, England.  It was the historic coaching route and main road to Ipswich from the Middle Ages onwards, and was part of the A12, a main road in East Anglia, until the A12 was rerouted in 1974. Zīlāni is a village in Kūkas parish, Krustpils municipality, Latvia.  It is located 3 km northeast of Jēkabpils town.  The village lies on the A12 road, which is part of the E22.  The village was formerly connected by railway but its station closed in 1995. The M12 motorway was a planned motorway starting in north-east London and joining the A12 road in Essex.  The 1960s scheme would have started at a junction with the M11 motorway and North Circular and ended near Brentwood, Chelmsford, or at the proposed new Maplin Sands airport; the motorway was part of the ambitious London Ringways plan to build motorways throughout London.  Although most of the Ringways plan was cancelled in 1973 the M12 motorway project was still included in the Roads for Prosperity white paper published in 1989 along with major proposed developments to the A12 road.  It was not formally cancelled until 30 March 1994 by the Secretary of State for Transport, John MacGregor. The European route E 22 is one of the longest European routes.  It has a length of about 5320 km .  Many of the E-roads have been extended into Asia since the year 2000; the E 22 was extended on 24 June 2002. Bow Interchange is a busy grade-separated road junction on the East Cross Route (part of the A12 road) between Bow and Stratford in east London, England.  It is a triple-level junction where the A12, Bow Road (the A11 road), and Stratford High Street (the A118 road) meet.  The River Lea runs underneath the junction.

Supporting sentences:
Zīlāni is a village in Kūkas parish, Krustpils municipality, Latvia.  The village lies on the A12 road, which is part of the E22. The European route E 22 is one of the longest European routes.  It has a length of about 5320 km .