The phrase "additional driver" is correct and usable in written English.
It can be used when referring to someone who is permitted to drive a vehicle in addition to the primary driver, often in the context of car rentals or insurance policies.
Example: "When renting a car, you can add an additional driver for a small fee."
Alternatives: "extra driver" or "secondary driver".
Sometimes legal or supply chain requirements act as an additional driver of innovation.
An additional driver for this is global demand for rare earth metals used in technology such as mobile phones.
"With Dollar and Thrifty, there is really no good way to avoid the additional driver fee," he said.
The one-day rate for groups is $700 for the first driver and $150 for each additional driver, with a maximum of three drivers a vehicle.
"I can offer you a $30 discount and one additional driver at no extra charge, although we normally charge $6 a day," he said.
I queried this and was told that €35 was for an additional driver, which was correct, with the balance of €82.25 being an "inter-city charge".
ADDITIONAL DRIVERS If you're planning to have more than one person drive a rental car, it may come as a surprise to find out that most companies charge $8 to $12 extra per day for each additional driver.
Some companies, including Avis, Budget and Enterprise, waive this fee if the additional driver is your spouse or domestic partner; Alamo, Hertz and National do as well, if you join their frequent-renter program.
But Avis and Budget have the most flexible policies, waiving the fee if the additional driver (regardless of sex) is the renter's "spouse, mate, life companion, significant other" or domestic life partner.
For example, if you put your child on to your vehicle's policy as an additional driver and they had a collision resulting in a claim for or against them, you will lose your NCD.
If you expect to share the driving on your trip, Mr. Weinberg suggested investigating any additional driver fees, which some companies like Avis, Budget and Enterprise waive for a spouse or domestic partner.
