Question

A commercial motor vehicle driver operates on a $70$-hour/$8$-day schedule for a carrier operating vehicles every day of the week. Over the preceding $7$ consecutive days (Days $1$ through $7$), the driver logged the following cumulative on-duty hours:

- Day $1$: $9.5$ hours
- Day $2$: $10.0$ hours
- Day $3$: $8.5$ hours
- Day $4$: $11.0$ hours
- Day $5$: $9.0$ hours
- Day $6$: $7.5$ hours
- Day $7$: $8.5$ hours

Following a qualifying $10$ consecutive hours off duty, the driver begins Day $8$ at $05:00$ and immediately logs $2.0$ hours of on-duty (not driving) time performing pre-trip vehicle inspections and loading cargo. Assuming no adverse driving conditions, what is the maximum number of driving hours the driver can legally log on Day $8$ before reaching any Federal Motor Carrier Safety Administration (FMCSA) Hours of Service limit?