Entering the USA from Canada by car

[Great Dane]

Hello

I know about the ESTA requirements but they onlky apply if arriving to the USA by ship or air. My british wife is entering the USA by car from Canada. Will she be issued with a I-94 at the border?

Please help me

Tnak you

Michael

[Great Dane]

My wife is meeting up with her sister in Canada at relations (the sister is British living in the USA legit with a green card) before they return to Cincinnati a couple of days later in my ssister-in-laws' us car My wife flies back to the UK ten days later ...

Thanks for your help much appreciated

Michael