Journal of Advanced Transportation / 2017 / Article / Tab 1

Research Article

A Novel Approach for Operating Speed Continuous Predication Based on Alignment Space Comprehensive Index

Table 1

Site geometric design characteristics.

VariableMinimumMaximumMeanStandard deviation

Design speed (km/h)60.00120.00108.3215.62
Horizontal curve radius (m)400.003500.00868.05218.65
Curve length (m)284.221155.48902.6589.37
Deflection angle of horizontal curve6.5171.1237.2212.36
Length of spiral curve135.001800.00728.93106.32
Tangent length (m)121.002245.001253.28185.21
Grade (%)−5.405.000.632.57
Length of vertical grade (m)160.001300.00776.89165.79
Lane number4.008.006.750.93
Lane width (m)3.503.753.700.12
Left shoulder width [hard/soft] (m)[1.00/0.75][1.25/0.75][1.17/0.75][1.02/0]
Right shoulder width [hard/soft] (m)[3.00/0.75][3.50/0.75][3.35/0.75][0.56/0]

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