What's under a Glasgow driveway
This is Illinois River country upland, with heavy silt soils and winters that cross freezing over and over. Water in the base freezes, expands and lifts the surface, and the crack that leaves takes in more water the next season. Grade and compaction interrupt that cycle, so they get the most attention.
A cheap bid usually gets cheap somewhere you cannot see. Ask what depth of stone goes down, how thick the asphalt is after rolling, and who fixes it if water still stands.
Compacted asphaltTypically 2 to 3 in. for a car drive
Stone baseTypically 4 to 8 in., compacted
Drive on itUsually 2 to 3 days, longer in heat
First sealcoatTypically 6 to 12 months after paving
Typical ranges. Your Glasgow estimate is sized to the soil, the traffic and the drainage on your property.