Incomplete Service Area

Question

I am using our cities centerline feature layer and merged our bike route feature layer. I have run topology and fixed the errors that it found. What we are trying to do is find which portions of the new bike route give the most access to local roads. The facility points in the analysis are the acutely center point of each new bike route segment. We run the service analysis from that facility point, the cutoff is 1mi, the buffer is 1000ft, I have set restrictions to prohibit access to major collectors, major arterial roads and interstates. There are no field that indicate street direction in our database. But when i run the analysis it appears to only show the service area on one side of the street, not both even if the adjacent street is directly across from the facility point. i have attached a screenshot. blue indicates the streets included in the analysis for that point, but you can clearly see streets directly across that are not included. If I use the complete set of centerlines (no restrictions) it will show service area on either side of road.

do you think there is something wrong with the dataset, the restrictions, etc....

ND_Screenshot.jpg

MarkGambordella · Answer

thank you for the info.  I went back and cleaned up the centerline dataset even more.  seems there were additional streets not connected, routes overlapped, etc...  the analysis is not perfect, but it is better than before.  I had to draw in additional lines to fill in gaps or tie neighborhoods together.  For now, the analysis will work.  But moving forward we need to focus on correctly issuing streets and connections within the dataset.

Melinda Morang · Answer

You could change your restriction's usage type to "Avoid High" instead of "Prohibited".  This will allow the biker to use the large roads if no other path is available.  Documentation: https://pro.arcgis.com/en/pro-app/latest/help/analysis/networks/restriction-attributes.htm#GUID-E02CEE7B-7957-490F-BAD9-611FB50EB444

MarkGambordella · Answer

Thanks for clarification on the travel mode.  I will keep at it and figure something out.  But lets suppose, as an example, that each of my points were a pizza place and we only wanted delivery drivers to use local roads.  I would get the same results as I do now, correct?  The team that needs the analysis is going to pick which segments of the proposed bike route to complete first with current funding. those sections which offer the most access will be built first.  The other sections could be a yr or more away. So they did not want to use the proposed bike routes as a viable mode of transporation because it may be years before an adjacent section is completed.  Hence why bike route/major road is not included in a possible route.  Just not sure how to make it recognize the opposite side of the street (bike lanes will be on both sides of the street, so need to see access on all).  thanks for your assistance.

I did apply the symbology changes as you suggested.  it showed the restrictions as "red" and populated node points at each intersection, no errors were indicated in the symbology.