On average there’s 6-8 lanes in each direction, so 12-16 in total. Those 6-8 lanes are split into two roadways, one for local traffic and one for express traffic. At some interchanges you can switch between the local and express roadways and at those points a few extra lanes for the ramps are where the 20-lane figure comes from.
On average there’s 6-8 lanes in each direction, so 12-16 in total. Those 6-8 lanes are split into two roadways, one for local traffic and one for express traffic. At some interchanges you can switch between the local and express roadways and at those points a few extra lanes for the ramps are where the 20-lane figure comes from.
Oh ok only 12-16 lanes
Well there’s your problem