The western and the central parts of Leningrad Oblast are well covered by paved roads. The M10 highway connects Saint Petersburg with Moscow via Veliky Novgorod in the south and with the Finnish border, continuing across the border to Helsinki, in the north. It is split between European routes E18 (Saint Petersburg to Finland) and E105 (Saint Petersburg to Moscow), and much of it within the oblast is built as a dual carriageway. R21 highway (also part of E105) runs from Saint Petersburg to Murmansk via Petrozavodsk, and A180 (part of E20) connects Saint Petersburg with Ivangorod and continues across the Estonian border to Tallinn. R23 connects Saint Petersburg with Pskov; it is a part of the E95. A114 runs to Vologda via Cherepovets. A paid motorway between Saint Petersburg and Moscow and the new A121 from Saint-Petersburg to Sortavala, around the Western coast of Ladoga are under construction. Roads are well served by bus traffic.