How to make "Car" a separate class for classification using this model?

https://uk.mathworks.com/help/phased/examples/pedestrian-and-bicyclist-classification-using-deep-learning.html?s_eid=PEP_16543

The model uses "Pedestrain & Bicycle" for classification using "car" as a noise signal. What if you wish to make Car a seprate class? I tried looking at "BackScatter Pedestrain" where the class handle is used to create a class for "Pedestrain". It has many features that are in built hence creating a replica is not possible.