TORUS 2025 Help
Appendix / Notifications
In This Topic
    Notifications
    In This Topic

    Warning Symbols

    As you create/edit your roundabout design, if TORUS can create/draw the element but it violates user-defined design conditions in doing so, TORUS will generate the element with parameters violated and a warning symbol (a letter-number code within a triangle) will appear near that element, and a Notification Legend will appear detailing the reason for the warning.

    Error Symbols

    As you create/edit your roundabout design, if TORUS cannot create/draw an element, an error symbol (a letter-number code within a circle) will appear near where the element would be expected, and an Error Legend will appear detailing the reason for the error.

    Symbology Explained

    The number element of the notification symbol corresponds to its sequential place on the corresponding legend that will appear. The letter element of the symbol corresponds to the element and encountered problem listed below (symbol can be warning or error unless noted otherwise):

    Symbol Category Possible Solution (please note that the list of solutions is not exhaustive)
    A

    The edges cross, this may result in incorrect movements or fastest paths.

    The fastest path or movement could not be generated due to entry, circulating, or exit width/offset constraints.

    The entry or exit leg (including road and splitter island envelope edges) is shorter than the distance specified in the Fastest Path Settings.

    The movement could not be generated because there are no valid entry/exit lanes.

    The movement crossed a road or splitter island envelope edge.

    These errors occur in adaptive roundabouts.

    • Redraw or edit the edges where the fastest path or movement occurs to correct the edge geometry - the edges of the roundabout need to be drawn to match as closely as possible actual roundabout designs because adaptive roundabout is not constrained by vehicle movements or geometric relationships and therefore relies largely on the replication of actual designed elements for the evaluate tools to work their best. To this end, the user is urged to ensure that edges do not overlap each other and that they intersect appropriately.
    • Redraw or edit the edges in the leg to make them longer. This involves making the road edge (outside) and splitter island envelope edge (inside) both longer for the leg.
    • Turn the entry/exit lanes on to draw the movement.
    B The bypass could not be generated in the approach leg.
    • Change the bypass lane offset.
    • After or instead of changing the bypass lane offset, lengthen the affected approach legs.
    C Design condition violation.
    • Adjust the minimum/maximum value for the applicable design condition in the Design Conditions category of the design guideline.
    • Adjust the inscribed circle diameter.
    • Adjust the central island diameter.
    • Adjust the circulatory offsets.
    • Adjust the entry path radius and offsets.
    • Adjust the exit path radius and offsets.
    E Issue regarding the edges/curbs.
    • Use the Draw Bypass Lane option.
    • Use the Draw Intermediate Path Radius option.
    • Increase/decrease entry/exit radii.
    F Fastest path cannot be drawn.
    • Change the radii of the affected adjacent approach legs.
    • Move the central island.
    • Change the alignment of the affected adjacent approach legs by replacing the reference geometry or by rotating them.
    • Increase the diameter of the inscribed circle or of the central island.
    • Increase the diameter of the inscribed circle or of the central island.
    I Splitter island could not be generated.
    • Adjust the entry lane to splitter island envelope offset.
    • Adjust the exit lane to splitter island envelope offset.
    L Issue regarding entry or exit lanes.
    • Change the radii of the affected approach leg.
    • Change the alignment of the affected approach leg.
    • Move the central island.
    • Change the diameter of the inscribed circle or of the central island.
    • Lengthen the leg.
    M Vehicle movement could not be generated
    • Change the radii of the affected adjacent approach legs.
    • Use the intermediate turn radius to insert an intermediate arc between the affected approach legs.
    • Move the central island. Change the alignment of the affected adjacent approach legs.
    • Increase the diameter of the inscribed circle or of the central island.
    O

    Opening Width vehicle path could not be created

    Opening Width vehicle path too wide for circulating lane

     

    This error occurs in turbo roundabouts.

    • Change the leg's Circulating Lane Opening Width type to Opening Width and specify a larger value.
    • Select a different design guideline that has the Circulating Lane Opening Width option set to Opening Width and then update the turbo roundabout.
    • Select a different design guideline that specifies a narrower, more maneuverable, Opening Width design vehicle.

     
    P

    Could not compute separators

    Could not find exit separator location

    Nose width is not greater than the separator width

    Could not generate the Mountable Curb

     

    These errors occurs in turbo roundabouts. Nose width:

    • Change the values specified in the design guideline
    • In the Configure Mountable Curb dialog box, change the Mountable Curb Nose Width so that double it's value is equal to or less than the separator width specified in the design guideline, or, change the separator width in Configure Circulating Lanes to be double the value of the Mountable Curb Nose Width.

    Could not generate the Mountable Curb:

    • Change the values specified in the design guideline to correctly to draw a mountable curb.
    • Adjust the settings in the Configure Mountable Curb dialog box.
    R

    The reference geometry contains a change in deflection greater than 10 degrees and cannot be used.

     

    The reference geometry contains a change in deflection greater than 5 degrees.
    • Ensure that the polyline does not contain line segments with deflection greater than 10 degrees.
    • Ensure that the polyline does not contain line-to-arc segments with deflection greater than 5 degrees.
    • If the polyline includes an arc segment, ensure that the arc is greater than 50 feet.
    S Sight line cannot be drawn.
    • Change the radii of the affected adjacent approach legs.
    • Move the central island.
    • Change the alignment of the affected adjacent approach legs by replacing the reference geometry or by rotating them.
    • Increase the diameter of the inscribed circle or of the central island.
    T Could not generate the Fastest Turn Path.
    • Change the radii of the affected adjacent approach legs.
    • Move the central island.
    • Change the alignment of the affected adjacent approach legs by replacing the reference geometry or by rotating them.
    U

    Too many Spiral Start legs in a Sector.

    No Spiral Start leg in a Sector.

    These errors occur in turbo roundabouts.

    • Add a leg to the turbo roundabout in the sector with the error notification.
    • Rotate the Primary Axis so that there is a Spiral Start Leg in each sector.
    W Crosswalks/refuges could not be generated.
    • Adjust the entry lane to splitter island envelope offset.
    • Adjust the exit lane to splitter island envelope offset.
    • Change the crosswalk offset.

    Notifications Specific to the FDOT Roundabout Type

    Symbol Category Possible Solution (please note that the list of solutions is not exhaustive)
    E Intermediate path arc did not generate. Increase the Intermediate Path Radius value.
    I Splitter island did not generate. Ensure that the Nose Radius value is greater than zero.
    L Start/end of leg reference geometry must be within ICD. Ensure that the end of the leg reference geometry closest to the center of the roundabout is within the Inscribed Circle Diameter.
    L Unable to generate leg, increase leg reference geometry length. Increase the length of the leg reference geometry.
    L TAN1 line crossed leg reference geometry. Decrease the Approach Radius 1 Start value to 400.

    or

    Straighten the leg reference geometry arc.
    L Entry geometry did not generate.

    Decrease the Offset Left value, decrease the Approach Radius 2 value, increase the Outer and Inner Offset values, increase the Inner-Outer Offset value, decrease the Approach Radius 1 Start value, decrease the Approach Radius 3 value.

    or

    Straighten the leg reference geometry arc.
    L TAN1 line did not generate.

    Decrease the Offset Left value, decrease the Approach Radius 1 value, increase the Approach Radius 1 Start value.

    or

    Straighten the leg reference geometry arc.
    L TAN2 crossed the leg reference geometry. Straighten the leg reference geometry arc.
    L Inner entry geometry crossed inner exit geometry. Decrease the Offset Left value.
    L Approach Radius 2 did not generate because TAN1 and TAN2 lines intersect.

    Decrease the Offset Left value, increase the Outer Offset value.

    or

    Straighten the leg reference geometry arc.
    L Approach Radius 2 arc crossed the leg reference geometry.

    Decrease the Approach Radius 2 value, decrease the Approach Radius 1 Start value, and decrease the Splitter Island Start Distance value.

    or

    Straighten the leg reference geometry arc.
    L

    Outer exit arc did not generate.

    		 Ensure that the Outer Exit radius value is greater than zero.
    L

    Inner exit geometry did not generate.

    		 Ensure that the Inner Exit radius value is greater than zero.
    L Outer entry arc did not generate. Decrease the Outer Entry radius value.
    L Inner exit geometry crossed outer exit geometry. Increase the Outer Exit radius value or decrease the Inner Exit radius value.
    L Inner entry geometry crossed outer entry geometry. Increase the Outer Entry radius value or decrease the Approach Radius 3 value.

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