Urban design - sidewalk and driveways

urbn-dsn-sdwlk-dwy-01.mp4 3:09

The sidewalk setup assembly is used to form an acceptable envelop that the proposed sidewalk profile can fall within. This is similar to the process used to develop curb return profiles. The assembly includes a slope range for the terrace and a slope range for an apron.

Requirement: Refer to WisDOT FDM SDDs 8d18 Driveway and Sidewalk Ramps Types X and Y and 8d19 Driveway and Sidewalk Ramps Type Z for current standards on minimum and maximum slopes for sidewalks and aprons.

urbn-dsn-sdwlk-dwy-02.mp4 5:20

1. Create new corridor. Example name: Setup-96-SetupSdwkProf
2. Run the region the length of the sidewalk.
3. Set frequency according to the FDM standard
4. Set horizontal targets as needed. Be sure to target the conditional subassembly to the driveway apron polylines to get automatic frequency creation at the driveways.
5. Set the curb and gutter slope control profile targets.
6. Create the following corridor surfaces
   • Crdr-Setup-Sdwk-Min
   • Crdr-Setup-Sdwk-Max
   • Crdr-Setup-Apron-Min
   • Crdr-Setup-Apron-Max
7. Links can be used for these setup corridor surfaces. Add the link (as breakline) that matches the corresponding surface.

urbn-dsn-sdwlk-dwy-03.mp4 6:42

1. Create the following surface profiles for the inside sidewalk alignment. These surface profiles will act as a guide for the development of the proposed sidewalk profile.
   • Crdr-Setup-Sdwk-Min
   • Crdr-Setup-Sdwk-Max
   • Crdr-Setup-Apron-Min
   • Crdr-Setup-Apron-Max
2. Create a surface profile for the inside sidewalk alignment on the existing surface. Use the sample offset option to create the profile at the outside edge of the sidewalk.
3. The apron surface profiles are only valid at the driveway locations. The driveway locations are easily visible based on the sudden drops in the profiles.
4. The existing ground surface profile is an indicator for where the proposed sidewalk profile should fall. For example. If the existing ground is higher than the range, the profile should follow closer to the upper end of the range.
5. Use the profile layout tools to develop a proposed sidewalk profile. Add transitions into and out of the driveway locations that meet ADA requirements.

urbn-dsn-sdwlk-dwy-04.mp4 6:25

1. Target the sidewalk profiles with the proposed corridor.
2. To add corridor frequencies at each of the sidewalk PVIs, there are two methods.
   • Label the PVI locations on the alignment and add corridor frequencies manually.
   • Create a dynamically linked feature line from the sidewalk alignment and proposed profile.
3. Targeting a dynamically linked feature line will likely be preferred in most cases. The only draw-back is the possibility of adding additional frequencies that are not needed.
4. Create a feature line from Alignment. Name the feature line logically, such as Sdwk-L. Style does not matter. Weeding is not necessary. Set the mid-ordinate distance to 0.5. Make sure the box is checked to create a dynamically linked feature line.
   1. OK
5. Target the dynamically linked feature line with the same subassembly used to created corridor frequencies at the curb head transitions. We called the subassembly TARGET-L-DwyPLines and TARGET-R-DwyPLines.

urbn-dsn-sdwlk-dwy-05.mp4 4:58

1. Target the proposed sidewalk profiles with the proposed corridor.
2. Create a new layer for polylines that represent driveway match locations (saw cuts). Create a layer for the left side of the roadway and the right side of the roadway.
3. Draw a polyline connecting the two apron polylines at the back of sidewalk. This will be the driveway match polyline.
4. Draw a polyline from the midpoint of the driveway match polyline perpendicular to the roadway centerline.
5. Extend this polyline down the driveway well past the anticipated match location.
6. Now, the driveway match polyline can be moved along that perpendicular polyline to quickline adjust the match location using the polyline's
7. Target the driveway match polylines with the roadway corridor (ByLayer).