From: Define Vehicle Classes
Use the Define menu > Moving Loads > Vehicle Classes command to access the Define Vehicle Classes form and add, modify, or delete vehicle classes.
Choose from the following buttons to complete the required action:
Add New Class button. Click this button to access the Vehicle Class Data form and add a vehicle class definition.
Modify/Show Class button.
Highlight the Vehicle Class definition to be modified in the Classes display area.
Click the Modify/Show Class button to access the Vehicle Class Data form.
Use that form to make the necessary modifications to the selected Vehicle Class definition.
Delete Class button.
Highlight the Vehicle Class definition to be deleted in the Classes display area.
Click the Delete Class button.
After vehicle classes have been defined, add the defined vehicle classes to the defined path using the Load Case Data - Moving Load form.