Comparing Three Lane Merging Schemes for Short-Term Work Zones: A Simulation Study

Table 1

Calibration and Validation Runs of the early SDLM.

		Early SDLMS calibration using travel time
Base Driving Behavior Parameter Set		Run Number
Car following model default parameter		Default	Run 2	Run 3	Run 4	Run 5	Run 6	Run 7	Run 8	Run 9	Run 10	Run 11	Run 12
CC0 Standstill 4.92 ft		4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92
CC1 Headway 1.20 s		1.2	1.50	1.50	1.50	1.50	1.25	1.10	1.10	1.00	0.50	0.50	0.50
CC2 Following 13.12 ft		13.12	50.00	40.00	35.00	35.00	35.00	20.00	10.00	10.00	10.00	10.00	10.00
CC3 Threshold −8		−8.00	−8.00	−8.00	−8.00	−8.00	−8.00	−8.00	−8.00	−8.00	−8.00	−8.00	−8.00
CC4 Negative −0.35		−0.35	−0.35	−0.35	−0.35	−0.35	−0.35	−0.35	−0.35	−0.35	−0.35	−0.35	−0.35
CC5 Positive F 0.35		0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35
CC6 Speed Del 11.44		11.44	11.44	11.44	11.44	11.44	11.44	11.44	11.44	11.44	11.44	11.44	11.44
CC7 Oscillation 0.82 ft/sec^2		0.82	0.82	0.82	0.82	0.82	0.82	0.82	0.82	0.82	0.82	0.82	0.82
CC8 Standstill 1.48 ft/sec^2		11.48	11.48	11.48	11.48	11.48	11.48	11.48	11.48	11.48	11.48	11.48	11.48
CC9 Acceleratil  .92 ft/sec^2		4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92	4.92
Lane changing model default parameter values
Own	Trailing
Maximum −13.12 ft/s^2	−9.48 ft/s^2	−9.48	−9.48	−9.48	−9.48	−9.48	−9.48	−9.48	−9.48	−9.48	−9.48	−9.48	−9.48
−1 ft/sec^2 100 ft	100 ft	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00
Accepted −3.28 ft/s^2	−1.64 ft/s^2	−1.64	−1.64	−1.64	−1.64	−1.64	−1.64	−1.64	−1.64	−1.64	−1.64	−1.64	−1.64
Waiting time before: 60 s		60.00	60.00	60.00	60.00	60.00	60.00	60.00	60.00	60.00	60.00	60.00	60.00
Min. headway from 1.64 ft		1.64	1.64	1.64	1.64	1.64	1.64	1.64	1.64	1.64	1.64	1.64	1.64
To Slower lane if Co 11.00 s		11.00	11.00	11.00	11.00	11.00	11.00	11.00	11.00	11.00	11.00	11.00	11.00
Safety reduction Fat 0.1		0.1	0.50	0.45	0.45	0.35	0.35	0.20	0.20	0.25	0.25	0.50	0.40
Maximum decelerat −29 ft/s^2		−29.00	−29.00	−29.00	−29.00	−29.00	−29.00	−29.00	−29.00	−29.00	−29.00	−29.00	−29.00
Travel time evaluation
Average simulated travel time (sec)		240.1	253.63	250.27	244.03	243.11	241.60	239.50	239.26	238.60	236.49	222.10	234.60
Average observed travel time (sec)		230.77	230.77	230.77	230.77	230.77	230.77	230.77	230.77	230.77	230.77	230.77	230.77
% Error		4.04%	9.91%	8.45%	5.75%	5.35%	4.69%	3.78%	3.68%	3.39%	2.48%	−3.76%	1.66%
𝑇-test		0.350	0.001	0.006	0.157	0.1873	0.27	0.365	0.361	0.38	0.54	0.35	0.53