2008 City-wide Survey

• Sidewalk condition and Curb-ramp count

• Based on drive-by visual observation

• Sidewalk Pedestrian Rate:

0 = sidewalk not present for the entire section

1 = Sidewalk is 100% present but not usable

2 = Sidewalk has limited, but not severe damage and can be used by someone in a wheelchair

3 = Entire sidewalk is determined to be in good condition with adequate width

Curb Ramp Count - number of curb ramps associated with the sidewalk segment.  A sidewalk segment is typically one block.

Good	Some damage but usable	Unusable

2008 Downtown Survey

• Detailed walking survey

• Recorded problems such as curb-ramp conditions (widths, slopes) and tripping hazards (broken sidewalk tiles, damaged basement covers for example).

• Surveyors recorded with tape measures and digital levels.

• Problem locations entered as points with GPS units

GIS

• Used to capture, store, analyze and manage the survey data.

• GIS keeps track of data with a table of attributes (features)

• Both surveys have been integrated into GIS for mapping and analysis

A Simple Example

• We want to know the locations of all non-compliant curb-ramps (no truncated domes, slopes too steep, etc.) in the downtown area

• Use the latest data from the Downtown Survey

• "Query the table" for attributes related to non-compliance 

• Map the selection

• Create a list of records if needed

• Review the list for prioritizing 

Resulting Map

• Blue dots are locations of non-compliant curb-ramps

• Information about each point is available in the attribute table

Another Example

• We want to know how many sidewalk segments with a missing curb-ramp are within 2,640 feet of a school (Herff Elementary for example)

• After a query, the result is:

                         236 even segments (blocks) missing curb-ramps

                         277 odd segments missing curb-ramps

Map 

• Dotted lines are even side blocks and solid yellow lines are odd side blocks

Last Example

• We want to know how many usable segments are missing a curb-ramp and have a bus stop throughout the city.  We are also interested in an estimated repair cost.

• Total # of blocks: 1,733

• Estimated cost to repair: $17,330,000

• Repairs cost  is estimated at $10,000 per block for installation of 1 curb-ramp and approx. 60 feet of new sidewalk (if needed) to the bus stop.

• VIA Bus Stops (dots) and usable sidewalk segments missing curb ramps (red lines)

 
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