Modeling sidewalk network with ADA ramp and crosswalk for the use of network analyst.

Question

Hi,

My professor asked me to model a sidewalk network with a point layer representing ADA ramps and a line layer representing crosswalks. I tried many ways to model it but failed in different ways.

Since the points would have no meaning in the network dataset, which means that in the network analyst routes would go through intersections that have no ramp. In the real world it is not feasible if a handicapped person wants to cross a intersection where there is no ramp. Can anyone give me some advice?

Thanks a lot!

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PatrickClaflin · Answer

Hello all,

I am curious if you found a method to restrict these types of routes in your network. I am working on a similar problem (ADA accessible routes through sidewalks at a University) and I'm having trouble getting a restriction on a point to work.

For example, I have an elevated walkway and want to restrict solutions similar to the crosswalk problem mentioned previously. Stairs are not a restriction when walking, but those in a wheelchair must use an elevator. I have points which mark the edge of the stairs and an associated "barrier" attribute. I set up a descriptor in the network where if barrier is true, it should be prohibited, but this does not work.

I have also opened a support ticket with Esri, but wanted to see if you had a working solution. Thanks for any help you can provide!

JaySandhu · Answer

The point needs to be restricted only when you are solving for an ADA route. For normal pedestrian the restriction should be turned off. In the Paris network dataset, there is a DriveTime for cars and PedestrianTime for walking/metro. You can have a ADARestriction that is ON when you want to route wheelchairs. This will be a choice you make when you create the route analysis layer to do routing on your network.

Jay Sandhu

PengyuLi · Answer

Dear Jay,

I went through it again. The problem here is that if I make a Point (ramp) restricted, the movements that go through sidewalks would be blocked too (I mean the pedestrians, who do not cross the crosswalk, turn at the corner of the sidewalk.). One way to solve it is to put the points away a little bit from the sidewalks but it does not demonstrate the real-world scenario, where there could be only one ramp on one side but we have to put two points. Could you please give me some advice? Thanks a lot!