From ARVambulance.com:

2020  Ford F550 4×4/ARV Type I custom ambulance

Congratulations to Lake Forest Fire Department on the purchase of your 2020 Type I Ford Custom Ambulance.  Thank you for choosing to work with American Response Vehicles and our Staff. This Custom AEV ambulance hosts a series of custom features designed not only to provide a higher level of patient care, but provider safety.

American Rescue Vehicles Type 1 ambulance

ARV photo

thanks Keith