Research Article

Traffic Flow Modeling of Freeway Variable Speed Limit Control Based on the Big Data of Driving Behavior

Table 2

Percentages of smaller than 1 s headway within different density intervals under different speed limits.

LaneDensity intervals (veh/km)Percentage of less than 1 s headway under different speed limits
No VSL120 km/h100 km/h80 km/h60 km/h50 km/h

Left lane0–524%21%15%
5–1032%28%19%15%
10–1535%26%14%10%
15–2037%26%14%11%15%20%
20–2536%29%14%16%18%

Middle lane25–309%6%
5–1015%11%7%
10–1522%16%12%7%
15–2026%20%14%12%14%14%
20–2523%22%14%

Right lane25–303%3%
5–107%6%4%3%
10–1513%11%5%4%5%
15–2018%14%