Why do streets not get a coat of sealant like parking lots do?

Question

Why do I see entire parking lots get a coat of sealant, but never really see streets or highways get a large coat of sealant?

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For example: [https://youtu.be/Lmd1r0P0GWE?t=192](https://youtu.be/Lmd1r0P0GWE?t=192)

In: 709

Answer 1

Actually, they do – it’s called Chip-Seal, it starts with a spray of very sticky sealer, then they add a fine gravel, then after some time, they add another spray of sealer. Typically done on secondary roads.

[https://youtu.be/n7iW_Rpk2Go?t=118](https://youtu.be/n7iW_Rpk2Go?t=24)