Image Explanation (L to R):
FIG 1. First, we identified a few places that we determined were hot spots for Downtown. A radius was added for each at the three specified steps of ¼, ½, and ¾ miles, which shows us the furthest extent the network can reach.
FIG 2. The next step was to begin building our pedestrian network in ArcGIS by modifying the publicly-available street grid provided by the City of Pittsburgh DCP, taking away highways and adding public stairs, trails, and cut-throughs. For the sake of time and simplicity we went ahead and drew the pedestrian paths down the middle of the street when the sidewalk was available on both sides. NOTE: The image in Fig. 2 was partially completed at the time it was taken.
FIG 3. Once the network was built we specified the creation of three radii from our original origin points: 5, 10, and 15 minutes away (¼, ½, & ¾ mi). The output is processed through GIS software, and the resulting information is combined to give a good sense of walkability in the area. Particularly in this image, the impact of the rivers on inter-neighborhood mobility is apparent.
Following this last step we were able to create our own "ped shed" of the total possible area a pedestrian could get to using our parameters, the final results of which are shared below.
Click here for an example of this process at work for Washington DC’s Metro system, and click here for a good look at the reasoning and methodology behind the impetus for this process.
We specified different points of interest in the Golden Triangle in order to assess how well-connected they were to their surrounding areas. The outdoor plaza of Market Square boasts the largest average concentration of pedestrians in Downtown according to the Public Space-Public Life Survey conducted last year. Because so many people arrive and depart from the space throughout the day, it began as the basis of our walkability analysis.