Unbalanced Multiple Left Turn Lane Usage Modelling: From Individual Choice to Aggregate Volume

Table 2

Static influential factors of the LTL usage.

No.	Category	Name	Unit/Measurement
SF1	Turning curve	Turning radius	At the DLTLs: 0=inside LTL, 1=outside LTL.; At the TLTLs: 0=inside LTL, 1=median LTL, 2=outside LTL.
SF2		Skewedness	0=no, 1=yes.
SF3	Intersection approach	Length of signal cycle	Second.
SF4		Length of red phase	Second.
SF5		Length of green phase	Second.
SF6		Lane type	0=unshadowed, 1=shadowed.
SF7		Length of turn bay	Meter; measured from the stop line to the end of shadowed LTL, or 0 if no LTL is shadowed.
SF8		Length of white solid line	Meter; measured from the stop line to the beginning of white solid line.
SF9		Length of upstream segment	Meter; measured from the beginning of white solid line to the upstream intersection.
SF10		Location of the first left-turn sign	Meter; measured from the stop line to the first left-turn sign at upstream.
SF11	Vehicle type	Proportion of heavy vehicle	Proportion of heavy vehicle number in the each LTL volume.