Table 1 Length of speed change lane transition section.

From: Optimizing speed change lane lengths for two-way ten-lane expressways: a VISSIM and SSAM simulation-based approach

Mainline design speed (km/h)

120

100

80

60

Recommended length of the transition section (m)

90

80

60

50

  1. The length of the acceleration section, L0, is calculated based on the merging speed V1 on the mainline and the ramp speed V27:
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