Identification of Working Trucks and Critical Path Nodes for Construction Waste Transportation Based on Electric Waybills: A Case Study of Shenzhen, China

Table 2

State data of garbage trucks recorded in electronic waybills.

Variables	Data sample	Value introduction
Duration of stay	30	Numeric type
Declaration and discharge states	1	0 is not the specified garbage truck
		1 is the specified garbage truck
Load states in and out of the electronic fence	1	0 is no change
		1 is empty becomes heavy
		2 is heavy becomes empty
Waybill generation	1	1 is generate waybill
		0 is no waybill generate
Carrying	1	0 is no-load state
		1 is heavy-load state
Carriage open	0	0 is door closed
		1 is door opened
Lift	0	0 is unlifted state
		1 is lifted state