Signalized Intersection Setup

The Intersection Setup table for signalized intersections is shown in the figure of the table below.

Table definitions are presented in the table below the figure Intersection Setup: Signalized Intersection Table. Common parameters are described in a separate chapter (see section Common Parameters and Unknown Control Type).

Figure 6: Intersection Setup: Signalized Intersection Table

The intersection setup table for the signalized control type includes all of the common parameters listed for the unknown control type (see section Intersection Setup: Common Intersection Setup Parameters), plus the parameters listed in the table Intersection Setup: Signalized Intersection Setup Parameters below. The table also lists for each parameter if applicable, units, default values, value ranges, relevant signalized methodology (HCM 6th Edition, HCM 2010, HCM 2000, ICU, Circular 212), and ANM indicator if the parameter is used when exporting to Vissim.

Table 2: Intersection Setup: Signalized Intersection Setup Parameters

Parameter Description Units  6th, 7thEd. 2010 2000 ICU 212 CCG ANM

Analysis Method

Intersection capacity analysis methodology for selected intersection based on control type.

Signalized options: HCM 7th Edition, HCM 6th Edition, HCM 2010, ICU1, ICU2, Circular 212 Planning, Circular 212 Operations, HCM 2000, Canadian Capacity Guide (CCG)

 

 

 

 

 

 

 

 

Lane Width

Width of the travel lane

Default = 12 ft (3.7 m), Range = any number

ft or m

x

x

x

x

x

x

x

No. of Lanes in Entry Pocket

Defines how many lanes of the approach geometry are pocket lanes. A pocket lane is a lane added on the approach of an intersection. Pocket lanes are most commonly used for turning movements, but may be used for through movements, as well. The pocket lanes are always defined to either the left or right of the through movement. For the example case of a two-lane road with the approach lane geometry of a 1-Left, 2-Thru, 1-Right, there would be 1 pocket lane defined each for the left and right lanes. In a more complex example, a two-lane road with the approach lane geometry of 1-Left, 3-Thru, 1-Right, there would be 1 pocket lane for the left and 2 pocket lanes to the right.

Default = 0. Range = 0 – [# turn+through lanes – 1]

 

x

x

x

x

x

x

x
Entry Pocket Length Length of the respective pocket lane(s) Default = 0. Range = 0 – entry link length. ft or m             x
No. of Lanes in Exit Pocket

Defines how many outbound Exit Pockets are on the leg. Exit pockets can be used to define lane drop or downstream tapers, most commonly used for dual-left turn lanes or on through lanes. Pockets can be defined left or right of the thru movement or as inside or outside exit pockets. Exit pockets will automatically be added when intersection legs are connected.

Default =0. Range = 0 – [number of exit lanes -1]

              x
Exit Pocket Length Length of the respective pocket lane(s) Default = 0. Range = 0 – exit link length. ft or m             x

Median

A checked box defines a center median for the approach. A median is a dividing separation between opposing directions on an approach.

 

 

 

 

 

 

 

x

Median Length

Length of the median for the selected approach measured upstream from the stop bar location.

Default = 0. Range = 0 – approach link length

ft or m

 

 

 

 

 

 

x

Median Width

Width of median for selected approach

Default = 0. Range = 0 – any real number

ft or m

 

 

 

 

 

 

x
Offset

Defines the leg’s approach offset to the center of the intersection in the direction of the legs’s approach direction. A positive value shifts the offset to the right and a negative value shifts the offset to the left.

Default = 0. Range = -1000 – +1000

ft or m             x

Speed

Speed of selected approach

Default = 30 mph (48.3 km/h). Range = 1 - 255

mph or km/h

x

x

x

 

 

 

x

Grade

Grade (slope) of the selected approach

Default = 0. Range = 0.00 – 100.00

%

x

x

x

 

 

x

x

W_cd, Curb-to-Curb Width of the Cross Street

Curb-to-curb width of the cross street (used for bicycle analysis with HCM since 6th Edition).

ft or m

x

            

W_bl, Width of the Bike Lane

Width of the bicycle lane (used for bicycle analysis with HCM since 6th Edition).

ft or m

x

            

W_os, Width of Paved Outside Shoulder

Width of the paved outside shoulder (used for bicycle analysis with HCM since 6th Edition).

ft or m

x

            

Curb Present

A checked box defines a curb is present (used for bicycle analysis with HCM since 6th Edition).

  

x

            

W_gk, Width of Striped Parking Lane

Width of striped parking lane (used for bicycle analysis with HCM since 6th Edition).

ft or m

x

            

Proportion of on-street parking occupied

Proportion of on-street parking that is occupied (used for bicycle analysis with HCM since 6th Edition).

  

x

            

W_a, Walkway Width Left of Sidewalk A

Total walkway width of sidewalk on left (used for pedestrian analysis with HCM since 6th Edition).

Note: Review HCM 6th Edition Exhibits 19-29 and 19-30. Width is the dimension of the landing area for curb ramps which may differ from the actual paved width of the sidewalk parallel to the approaches.

ft or m

x

            

W_b, Walkway Width of Sidewalk B

Total walkway width of sidewalk on right (used for pedestrian analysis with HCM since 6th Edition).

ft or m

x

            
Radius Corner Curb

Corner radius (used for pedestrian analysis with HCM since 6th Edition) is visualized in the Network Editor.

Note: Pre PTV Vistro 2021 networks that had a default 0 value will have a radius of 0 leading to sharp edges when the network is opened in PTV Vistro 2021 or later versions. To change the radius for all intersections at the same time use the Radius Corner Curb attribute in Multi Change tool under Edit > Multi Change.
ft or m             x

Crosswalk

A checked box defines a crosswalk on the selected approach

 

x

x

x

 

 

 

x

Crosswalk Width

Width of the crosswalk visualized in PTV Vistro. This parameter is used if exporting to Vissim. In Vissim the crosswalks are modeled using two opposing links, so each link has half the width of the full crosswalk width. A crosswalk with of 5 ft will generate a 10 ft crosswalk after exporting to Vissim.

Default = 6 ft (1.8 m) Range = 0 – any real number

ft or m

 

 

 

 

 

 

x
Crosswalk Length

Defines the length of the crosswalk.

 ft or m             x

No. of Right-Turn Channelizing Islands

The number of channelized right-turn islands encountered by pedestrians while crossing one intersection leg (used for pedestrian analysis with HCM since 6th Edition).

  

x

            

Channelized

A checked box defines a channelized right turn lane (left turn for left-hand model) for the approach.

 

 

 

 

 

 

 

x

Channelized Control

For a channelized turn lane, defines the control for entering the mainline traffic.

Options: SC (Signal Control), Stop, Yield, Target Lane (free)

 

 

 

 

 

 

 

x

Channelized Radius

Radius of the channelized turn that tangentially approximates to the outer boundary of the two approaches of the turn movement.

Default = 20 ft. Range = 0 – approach link length

ft or m

 

 

 

 

 

 

x

 

Highway Capacity Manual, 6th Edition’s Pedestrian Inputs (Exhibit 19-29 and 19-30)