Hi Bhetrand,
Beside using If widget as Vinod mentioned above, you can use If() function as well.
For example you can use this for Value: If(BooleanVar = True, 1, 3).
However, please note that to make sure data consistency, you need to get list of driver and filter it as requirement then use that Id to assign. Because hardcode the Id may cause error in other environments (QA or Prod) as Id may different. If the list driver is fixed mean no change then you can convert Driver entity to static entity then easily assign value.
Regards,
Khuong