Are plastic-embedded roads a threat to aquifers?

Are plastic-embedded roads a threat to aquifers?

Do plastic-embedded roads pose a long-term danger to aquifers by eventually releasing plastic nanoparticles to the soil? We are concerned about the reusing/recycling claims by plastic manufacturers who buy all our clean-dry-empty plastic.  Some manufacturers are embedding plastic into roads. They, however, do not give clear answers about the implication of using these recycle plastic in road's bottom layers.  Will the plastic eventually break off from the road, change to nanoparticles and end up in the aquifers? Will it flow to the streams nearby due to the rain and reach the oceans?