Expand an arm and click Entry in the left-hand pane. The Entry page is displayed.
The Design Speed can affect the turning capabilities of the vehicle if you have limited turning by lock-to-lock time. At higher speeds, vehicles will not be able to negotiate tight turns.
Select the Number of Lanes from the drop-down list.
The Lane Width is measured between centres of road markings. The innermost and outermost lane widths are measured to the nearside and offside definition lines respectively.
The Flare Lane Length is the distance over which the entry road width changes as it adjusts to accommodate the additional lane. This is normally a significant positive value to avoid a severe step in the nearside definition line.
The Flare Lane Taper Length Ratio is the length of the section where the road widens to allow for the flare lane (flare taper) based on the ratio of the width of the flare lane.
The Flare Lane Width is the minimum width of any marked lane.
The Nominal Overall Road Width is calculated as the Number of Lanes multiplied by the Lane Width plus the Flare Lane Width where the Flare Lane Length is not zero.
TheKerb Offset sets the offset of the kerb from the blend point.
The Kerb Taper Offset is the distance from the blend point to the point where the adjusting kerb taper starts (the taper is used to adjust the kerb offset from the outermost lane defined at the blend point to the kerb offset on the roundel or slip lane if a slip lane exists).
The Kerb Taper Length is the length of the adjusting kerb taper.
The Kerb Taper Outer Radius is the radius at the blend point end of the taper reverse curve (0 = no radius is applied).
The Kerb Taper Inner Radius is the radius at the roundabout end of the taper reverse curve (0 = no radius is applied).
Select Equal Spacing Between Lanes to even out the lane width.
The Longer Inner Lane Line defines which lane is longer (outer/inner) when adding extra lanes.
By default the ICD yield line is curved. To set a straight ICD yield line, select Straight Yield Line.
Some standards require individual lane yield lines set back from the ICD and roughly perpendicular to the lanes. Select Lane Yield Line if you require such markings.
If this exit is not relevant to flow calculations, e.g. it might be a service road, then select Ignore in Capacity Calculations.
In all cases the Max and Min values represent the limiting values from the adopted design standard.