File Name: fdss01.cri, fdss02.cri ...

Design Manual Reference: 1 1-2

Required Definition Files: standard

The fdss criteria is intended for Freeways, Expressways and Interstates. The typical section consists of a round bottom ditch configuration in cuts with variable hinge point slopes with options for user defined fixed cut and fill slopes. Definable variables determine cut ditch width and slope, or; by employing special ditch grade profiles, the designer can control the cut ditch elevation while varying either the ditch slope or width.

Utilization of a SLOPE CATCH POINT element is provided via a user defined variable.

• Definable Slope Catch Point. The designer has the option of tying variable slopes at a location determined by a global DEFINE_DGN variable: SLOPE CATCH POINT.
• Guardrail elements in a plan view DGN file can be used to determine where shoulder widening is necessary; regardless of cut or fill conditions.
• Channelization features of this criteria are designed to allow the user to specify channelization in areas where the channelization is sporadic. IE, The criteria will check for existence of the dgn element at each station. If present, channelization will be drawn, otherwise the section will be drawn normally.

This criteria includes the following Interchange Design features:

• Resolve Intersecting Slopes
• ShearPoint utilization
• ShearLine chain/profile utilization

"FD01 DITCH WIDTH"
Defined as the desired width of the cut ditch. No default definition is provided.

"FD01 DITCH SLOPE"
Defined as the desired slope value for the cut ditch front slope. No default definition is provided.

"FD01 USE DITCH GRADE"
Defined as 1 when a special ditch grade profile is to be used in locating the ditch point elevation.
Default definition = 0.

"FD01 DITCH GRADE LEFT"
Defined as the name of the GEOPAK profile to be used in locating the ditch point elevation on the left side of the cluster. If FD01 USE DITCH GRADE is not defined or defined as 0, definition of FD01 DITCH GRADE LEFT is not necessary.

"FD01 DITCH GRADE RIGHT"
Define as the name of the GEOPAK profile to be used in locating the ditch point elevation on the right side of the cluster. If FD01 USED DITCH GRADE is not defined or defined as 0, definition of FD01 DITCH GRADE RIGHT is not necessary.

"FD01 DITCH SLOPE SWITCH"
When using a special ditch grade, this switch specifies whether the normal slope or the normal width is to be used to location the cut ditch point.
Valid definitions are 0 or 1.
Define as 0 to use the normal or defined ditch width while varying the ditch slope. Define as 1 to use the normal or defined ditch slope while varying the ditch width.
Default definition = 0

"FD01 FIX CUT SLOPE"
"FD01 FIX FILL SLOPE"
When a fixed slopes are required, define as the fixed fill/cut slope value. If not defined, slopes will be variable.

"FD01 MAX CUT SLOPE"
"FD01 MAX FILL SLOPE"
Use these variables to over-ride the default maximum cut and fill slopes. The default maximums for both cut and fill are 2:1. If the required maximum is 3:1, define as 3.
NOTE: These variables are default defined using the global variables "FD MAX CUT SLOPE" and "FD MAX FILL SLOPE". If you desire to over-ride these defaults for an entire criteria run, you may pre-define the global variables once, instead of defining the local FD01, FD02, etc. variables.

"FD01 USE CATCH POINT"
When utilizing a SLOPE CATCH POINT element to set the cut or fill slope, define this variable as non-zero.
Default definition = 0.

"SLOPE CATCH POINT"
This variable is defined via a DEFINE_DGN statement, and specifies the symbology of elements in a plan view graphics design file representing the desired horizontal location of the slope tie point.
SLOPE CATCH POINT is a global type variable. There are no corresponding local versions.

"FD01 USE CHANNEL CURB"
When utilizing channelization curbing criteria subsequent to the FDSS, define this variable as non-zero. The FDSS criteria will test for existence of the curb origin element at each station.
When the curb origin element is found to exist, FDSS will leave the appropriate portions of the typical section un-drawn, to be finished by the channelization criteria. Also, when the curb origin element is not found to exist at a station, FDSS will draw the entire section normally.

"CHANNEL ORIGIN"
This variable is defined via a DEFINE_DGN statement, and specifies the symbology of elements in a plan view graphics design file representing the desired horizontal location of origin of the channelization curbing.
CHANNEL ORIGIN is a global type variable. There are no corresponding local versions.

"FD01 WIDENFORGUARDRAIL"
When FD01 WIDENFORGUARDRAIL is defined as 1, the criteria will widen fill shoulders for guardrail where warranted. If defined as 0, no consideration is given to guardrail shoulder widening.
The default definition is 1.

"FD01 WIDEN BY GUARDRAIL LINE"
When defined as non-zero, this variable causes the criteria to check for presence of guardrail elements in a plan view graphics design file. If found, it's horizontal location is used to compute the guardrail shoulder widening warrants. Guardrail shoulder widening is then performed without regard to cut or fill conditions.

"GUARDRAIL LINE"
This variable is defined via a DEFINE_DGN statement, and specifies the symbology of guardrail elements in the a plan view graphic design file. When used in conjunction with WIDEN BY GUARDRAIL LINE, shoulder widening is performed.
GUARDRAIL LINE is a global type variable. There are no corresponding local versions.

"FD01 DRAW GUARDRAIL"
When defined as non zero, this variable will cause the criteria to draw guardrail on the shoulder when shoulder widening is performed. The purpose of this feature is to inform the designer where shoulders were widened.
This variable is the local FDSS version of the global variable DRAW GUARDRAIL. The default definition is 1, therefore guardrail will always be drawn by default. To turn off the drawing of guardrail, define this variable as 0.

"FD01 FIX FILL SLOPE BY GUARDRAIL LINE"
When widening by guardrail line element, the criteria will also fix the fill slope according to the value of this variable. Note that the slope value of this variable will over-ride the "FD01 FIX FILL SLOPE" variable in the presence of the guardrail element.
Therefore, if 2:1 fill slopes are desired in conjunction with guardrail widening, define this variable as 2. When left to the default definition of 0, fill slopes will be variable, unless the "FD01 FIX FILL SLOPE" variable has been defined.

"FD01 FILL SHOULDER WIDENING"
This variable defines the actual width by which the criteria will widen fill shoulders for guardrail. FD01 FILL SHOULDER WIDENING is the FDSS local version of the global FILL SHOULDER WIDENING variable.
The default value is 3 feet or 1 meter.

"FD01 FILL WIDEN HEIGHT WARRANT"
This variable defines the fill height warrant for guardrail shoulder widening. The value is used in conjunction with the FD01 FILL WIDEN SLOPE WARRANT variable to compute the widening warrant.
This variable is the FDSS local version of the global variable FILL WIDEN HEIGHT WARRANT.
The default value is 12 feet or 1.524 meters.

"FD01 FILL WIDEN SLOPE WARRANT"
This variable defines the fill slope warrant for guardrail shoulder widening. The value is used in conjunction with the FD01 FILL HEIGHT SLOPE WARRANT variable to compute the widening warrant.
This variable is the FDSS local version of the global variable FILL WIDEN SLOPE WARRANT.
The default value is 2.

The widening warrant is computed using the slope and height warrant variables as follows:

Widening is warranted if Fill Height > (((( Fill Slope - FILL WIDEN SLOPE WARRANT ) X 10 ) X 0.7 ) + FILL WIDEN HEIGHT WARRANT)

Widening of shoulders for guardrail installation is warranted by the following equation.

FH (Ft or M) >= (6 Ft or 1.829 M x Side Slope (Ft/Ft or M/M)) - (6 Ft or 1.829 M)

FH = Fill Height (Elevation difference from the Hinge Point for Fills of the shoulders to the Slope Stake Point in Feet or Meters).

Side Slope = Slope from the Hinge Point for Fills of the shoulders to the Slope Stake Point in Ft/Ft or M/M. Evaluation is applied from the lower limit 1:1 to the upper limit 3:1 side slopes.

Examples

min FH = (6 x 2) - 6 = 6
For 2:1 side slopes, any fill height greater than or equal to 6 feet warrants guardrail.

min FH = (6 x 2.5) - 6 = 9
For 2.5:1 side slopes, any fill height greater than or equal to 9 feet warrants guardrail.

min FH = (6 x 3) - 6 = 12
For 3:1 side slopes, any fill height greater than or equal to12 feet warrants guardrail.

"FD01 ENABLE NONGUARDRAIL WIDENING"
A non-zero definition of this variable causes the criteria to include supplemental widening of fill shoulders where there is no guardrail. This widening is done depending on the height of fill as designated in the Roadway Design Manual, Part I, 1-4B, F-1
This variable is the FDSS local version of the global variable ENABLE NONGUARDRAIL WIDENING. The default value is 1. To over-ride and turn off this feature , define as 0.

"SHEARPOINT LINE"
This variable is defined via a DEFINE_DGN statement, and specifies the symbology of linear elements in a plan view graphics design file representing the shear line.
SHEARPOINT LINE is a global type variable. There are no corresponding local versions.

"FD01 USE SHEARPOINT"
Define as non-zero to use any of the shearpoint features of the criteria. Default definition is 0

"FD01 USE SHEARPOINT PROFILE"
Define as non-zero when the tie slopes are to be variable to a previously stored shearline profile/chain.

"FD01 SHEARPOINT PROFILE"
This variable is defined as the name of the Geopak profile to use on the shearpoint chain.

"FD01 SHEARPOINT PROFILE CHAIN"
This variable is defined as the name of the Geopak chain that was previously stored along the shearline.

"FD01 DRAW SHEARPOINT LINE"
Define as non-zero to have the criteria draw a representational vertical line at the shearpoint. This line will extend from the existing ground up/down to the the slope shearpoint. Default definition is 1

"FD01 SHEARLINE LEVEL" Default definition = 34
"FD01 SHEARLINE COLOR" Default definition = 0
"FD01 SHEARLINE WEIGHT" Default definition = 2
"FD01 SHEARLINE STYLE" Default definition = 0
These variables define the level, color, weight and line style to be used when drawing the shearpoint line, when the DRAW SHEARPOINT LINE variable is defined as non zero.

"FD01 SHEARPOINT NAME TEXT" Default definition = SP
"FD01 SHEARPOINT NAME LEVEL" Default definition = 57
"FD01 SHEARPOINT NAME COLOR" Default definition = 4
These variables define the level, color and actual text to be used when labeling the shearpoint. This label is used to store the shearline chain/profile.

"FD01 RESOLVE INTERSECTING SLOPES"
Define this variable as non zero to get the criteria to resolve intersections of standard slopes between shape clusters. See chapter on Interchange Design for more detailed instructions.
The default definition is 0.

"FD01 SHEAR AT SLOPE INTERSECT"
When RESOLVE INTERSECTING SLOPES is defined as non zero, and slope intersections are resolved, a non zero definition of this variable will cause the criteria to shear both slopes to the existing ground at the point of intersection between the slopes. If FD01 DRAW SHEARPOINT LINE is defined as non-zero, a representational vertical shearline will also be drawn.
The default definition is 0.

The following variables are local versions of global variables. They define standard level/symbology values that should usually remain static. These variables are listed here for documentation and thereby make them available for pre-definition over-rides.

The following variables are local versions of global variables. They are also variables that define standard dimensions that should usually remain unchanged. They are provided here for documentation purposes only.

Although the definition of these variables can be over - ridden, it is not recommended.