Sustainable Highway Design: Disentangling the Effects of Geometric-Related and Traffic-Related Factors on Urban Highway Traffic Emissions

Table 1

Traffic distribution and signal control of the two intersections.

Category	Intersection		Cao'an-Miquan				Cao'an-Yutian
	Direction		Total (pcu/h)	LT (%)	TH (%)	RT (%)	Total (pcu/h)	LT (%)	TH (%)	RT (%)
Traffic distribution	EB		728	15	81	4	723	6	89	5
	WB		737	7	73	20	838	5	85	10
	NB		171	18	62	20	146	29	50	21
	SB		345	53	31	16	232	46	27	27
	Phase	Maneuver	Green(s)	Yellow(s)		All-red(s)	Green(s)	Yellow(s)		All-red(s)
Signal control	I	EB and WB	30	3		0	35	3		0
	II	NB and SB	27	3		0	27	3		0

Note. pcu/h: Passenger Car Unit per hour (a Passenger Car Unit is essentially the impact that a mode of transport has on traffic variables, such as headway, speed, and density, compared to a single car), EB: east bound, WB: west bound, NB: north bound, SB: south bound, LT: left turn, TH: through, and RT: right turn.