I dont find Road api's specific parameter options and traffic light api in BeamNGpy documentation.

[lsm2842035890]

①I want to know what the options are for declaring the first parameter 'material' of a road. Where can I refer to this?In BeamNGpy documentation,i dont find Road api's specific parameter options.
②I want to set double yellow solid lines and white dotted lines on the roads I added. How should I set them to simulate real roads?

        right_marking = Road('line_white', rid='right_white')
        right_marking.nodes.extend(right_marking_nodes)
        scenario.add_road(right_marking)
    
        left_marking = Road('line_white', rid='left_white')
        left_marking.nodes.extend(left_marking_nodes)
        scenario.add_road(left_marking)

The method shown in the code assumes that the solid yellow and dashed white lines are replaced by very thin yellow and white roads.
Is there any other way to achieve this function?
③Is there any api to set traffic lights.
my version:BeamNGpy==1.28 BeamNG==0.31.0.3