A solo driver has been driving for 4 hours 20 minutes without a break. How much more driving is available before a 561/2006 break is required?

1. 40 minutes, to complete a 5-hour block
2. 10 minutes, because 4.5 hours is 4 hours 30 minutes
3. 1 hour 40 minutes, to complete the 6-hour US-style block
4. No limit until 9 hours of driving is reached