Table 2 Length of direct deceleration lane.

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

Mainline design speed (km/h)

 

80

100

120

Length of direct deceleration lane under different ramp design speeds(m)

30

124

150

175

40

116

143

168

50

107

135

161

60

97

126

153

70

73

104

134

80

–

–

97

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