Which road? A new highway M-11 is being built now between Moscow and St. Petersburg. Generally, my impression is that quality of roads got better last several years, especially comparing to the 00-s.I read a few years back the roads between Moscow and St Petersburg deteriorated to the point the trip takes 3x longer than it used to.
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The trip indeed takes longer now, because the current highway M-10 doesn't have enough throughput. Traffic load has reached about 150000 cars a day which three times exceeds maximum load.
The quality of road you can see here:
https://commons.wikimedia.org/wiki/Category:M10_highway_(Russia)
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