wish : bench with superelevation

[joantopo]

We can calculate superelevations for (lanes and shoulders) but  we can´t calculate for "bench".

Imagine that you have a platform (Undivided Crowned) with shoulders and  in the side itself, bench.

My problem is that design criteria (for superelevations) says that in curves,(curve turns left in this case), if shoulders superelevation> 4% then, the left bench have to have  the same superelevation that left shoulder superelevation.

I think that component bench should be integrated as element in "calculate superelevations".

Shoulders afford "shoulder slope treatment, neither (match line slopes, default slopes, breakover removal).

In this case, if existed bench component, I used (bench slope treatment=  match line slopes).

or subanssemblies, for example, daylightStandard, I think that subassemblies should have (superelevation=match line slopes).

[sboon]

Not sure that I understand what you're trying to do here, but it might be possible to use a parameter reference to get what you're looking for.

Perhaps a sketch would help.

Steve
Please use the Accept as Solution or Kudo buttons when appropriate

[joantopo]

EndNormalCrown: (symetric)

Left bench= -4%

Left Shoulder= -2%

Left lane= -2%

Right lane= -2%

Right Shoulder= -2%

Right bench= -4%

 (turn left)---(Start Station Spiral)

Left bench= -4%

Left Shoulder= -2%

Left lane= -2%

Right lane= 0 %

Right Shoulder= 0 %

Right bench= -4%

next SuperelevationCriticalStation (in spiral)

Left bench= -4%

Left Shoulder= -2%

Left lane= -2%

Right lane= +2 %

Right Shoulder= +2 %

Right bench= -4%

** break superelevationCriticalStation when outside lane > +4%

Left bench= -4%

Left Shoulder= -4%

Left lane= -4%

Right lane= +4 %

Right Shoulder= +4 %

Right bench= - 4%  

Start Curve (turn left)

Left bench= -7%

Left Shoulder= -7%

Left lane= -7%

Right lane= +7 %

Right Shoulder= +7 %

Right bench= -4%

 If turns left, when slope left lane is > abs(4%)   then  left bench has the same slope than left lane.

If turns right, when slope right lane is > abs(4%)   then  right bench has the same slope than right lane.

[sboon · Accepted solution]

I believe that this can be done using the software as is.  Your shoulders always match the lane slopes, so your assembly can be built with shoulder subas that use the outside lane superelevation parameters.  The bench is actually a shoulder, so you can apply that superelevation parameter there.

I ran the superelevation wizard using the Breakover removal option for the low side and Default slopes for the high side.  Note the Low shoulder Match station created by the wizard and that the right shoulder transitions to match the lane slope when it is > 3%

[joantopo]

Fine!!

I don´t understand this.

"so your assembly can be built with shoulder subas that use the outside lane superelevation parameters"

My assembly (right side) now is this:

S1 and S2  both are subassemblies = ShoulderVerticalSubbase.

S2 thickness is only = 0.001 m because I don´t want count that material. It is a bench.

For S1 (shoulder as a shoulder)  I can´t specify (use superelevation slope = right outside lane).

I think that S1 should be a subassembly lane type too, and then I could specify (use superelevation slope = right outside lane).

Is it right?

Thank you.

[sboon]

You have it correct.  Use LaneSuperelevationAOR for the S1 shoulder segment, with the same superelevation parameter as the adjoining lane.

An alternate solution would be to continue using the ShoulderVerticalSubbase sub you have now, but apply a parameter reference within the assembly so that the slope of the shoulder always matches that of the lane.

Steve
Please use the Accept as Solution or Kudo buttons when appropriate

[joantopo]

Excuse me.

Could you explain me better this second method, please?

"An alternate solution would be to continue using the ShoulderVerticalSubbase sub you have now, but apply a parameter reference within the assembly so that the slope of the shoulder always matches that of the lane."

Where is that parameter?

[sboon]

When a subassembly is used within an assembly there are a series of input parameters used to control its operation in a corridor.  Most of those input parameters are specified by you when you create the assembly.  Some of these inputs can also be controlled by corridor targets, alignment superelevation settings etc. 

Subassemblies also have output parameters.  These are the actual values that were used at each corridor station, and they are made available for use by subsequent subs in the assembly.  In the example below I have changed the settings for a shoulder sub to ignore all superelevation values and use default slopes instead.  I have also turned on the Parameter Reference option for this default slope and specified that the value should match the output of the adjacent lane slope.

Steve
Please use the Accept as Solution or Kudo buttons when appropriate