Difference between revisions of "Site conditions: road right of ways"

From LID SWM Planning and Design Guide
Jump to navigation Jump to search
Line 36: Line 36:
 
* Project support –property owners might choose to get involved in LID, but renters might not be inclined
 
* Project support –property owners might choose to get involved in LID, but renters might not be inclined
  
 +
Consideration should also be given to the expected type of road reconstruction
  
Once you have collected the necessary site condition information, you can return to [[Screening LID Options]]
+
{| class="wikitable"
 +
|-
 +
|
 +
<center>'''''''''Roadway resurfacing'''</center>
 +
 
 +
|
 +
The grinding of the base and top asphaltic compound to some nominal depth from the existing road surface and allowing for approximately 15-30% spot base repair where required while maintaining the original vertical design of the road.
 +
 
 +
 
 +
 
 +
May also include:
 +
 
 +
• Repair or replacement of concrete curb and installation of sub-drains
 +
 
 +
• Repair of concrete sidewalks
 +
 
 +
• Adjustment and/or replacement of driveway aprons and sod
 +
 
 +
|-
 +
|
 +
<center>'''Road Reconstruction'''</center>
 +
 
 +
|
 +
Complete removal and replacement of the major ROW elements including the road base and asphalt surface, concrete curb, sidewalks, and can include reconstruction or replacement of the sub-surface infrastructure (hydro, gas, water main, sanitary and
 +
 
 +
stormwater infrastructure).
 +
 
 +
 
 +
 
 +
Another type of road reconstruction can include the conversion of a rural cross section roadway into an urban cross section. This typically includes the installation of storm sewers, complete base and asphalt replacement, concrete curb placement, sub drains under curbs, and catch basin placement.
 +
 
 +
|-
 +
|
 +
<center>'''Road improvement for rural to urban cross section'''</center>
 +
 
 +
|
 +
As areas urbanize or infrastructure is upgraded rural cross section streets may be converted to an urban cross-section with curbs, gutters and storm sewers. Upgrades are one of the most common and economic opportunities in which LID can be incorporated into roads.
 +
 
 +
|-
 +
|
 +
<center>'''Roadway Reduction'''</center>
 +
 
 +
|
 +
A process in which the effective width or number of travel lanes contained in a crosssection is reduced in order to achieve system improvements. Roadway reductions can be used for traffic calming purposes, transit projects, alternative transportation strategies such as the interdiction of bicycle lanes, and pedestrian crossings. Through
 +
 
 +
the process of roadway reduction, areas of the ROW that were used for vehicular travel are converted to sidewalks, landscaped boulevards, and/or cycle lanes.
 +
 
 +
|}
 +
 
 +
 
 +
 
 +
 
 +
Once you have collected the necessary site condition information, return to [[Screening LID Options]]

Revision as of 19:51, 14 September 2017

It is critical that your project team understands the function of adjoining land uses and the activity that occurs in and around your retrofit site. Once an initial desktop assessment of the site is complete, the next step is to assess site conditions in order to confirm your assessment, determine the technical feasibility of implementing LID practices within the municipal road right of way (ROW), (i.e., the existing drainage conditions and general ROW characteristics), and identify and confirm any existing constraints.

Site specific constraints, considerations, and conditions that can be identified during a field visit include:

  • Road type
    • Local residential road
    • Residential collector road
    • Local industrial road
    • Industrial collector road
    • Minor arterial road
    • High density commercial road
  • Local landscaping features and the landscape aesthetic of surrounding site area
  • Overhead or underground utilities
  • Utility lines not marked in the drawings
  • Traffic patterns or safety concerns - how could the LID practice assist in traffic calming?
  • Parking volume and location
  • Encroachment issues – are there structures or features, such as fences, present?
  • Paved boulevard areas
  • Irregular surface drainage patterns, ponding, or lack of conveyance
  • Adjoining land use – what activities are present that could impact ROW retrofit design, construction, or maintenance (i.e. excess garbage)?
  • Use of the site – do residents use the ROW site to access other amenities, such as a transit shelter?
  • Current maintenance practices within the ROW
  • Are mature trees present? Could they impact construction, operations, and maintenance of the LID feature?
  • Project support –property owners might choose to get involved in LID, but renters might not be inclined

Consideration should also be given to the expected type of road reconstruction

''''Roadway resurfacing

The grinding of the base and top asphaltic compound to some nominal depth from the existing road surface and allowing for approximately 15-30% spot base repair where required while maintaining the original vertical design of the road.


May also include:

• Repair or replacement of concrete curb and installation of sub-drains

• Repair of concrete sidewalks

• Adjustment and/or replacement of driveway aprons and sod

Road Reconstruction

Complete removal and replacement of the major ROW elements including the road base and asphalt surface, concrete curb, sidewalks, and can include reconstruction or replacement of the sub-surface infrastructure (hydro, gas, water main, sanitary and

stormwater infrastructure).


Another type of road reconstruction can include the conversion of a rural cross section roadway into an urban cross section. This typically includes the installation of storm sewers, complete base and asphalt replacement, concrete curb placement, sub drains under curbs, and catch basin placement.

Road improvement for rural to urban cross section

As areas urbanize or infrastructure is upgraded rural cross section streets may be converted to an urban cross-section with curbs, gutters and storm sewers. Upgrades are one of the most common and economic opportunities in which LID can be incorporated into roads.

Roadway Reduction

A process in which the effective width or number of travel lanes contained in a crosssection is reduced in order to achieve system improvements. Roadway reductions can be used for traffic calming purposes, transit projects, alternative transportation strategies such as the interdiction of bicycle lanes, and pedestrian crossings. Through

the process of roadway reduction, areas of the ROW that were used for vehicular travel are converted to sidewalks, landscaped boulevards, and/or cycle lanes.



Once you have collected the necessary site condition information, return to Screening LID Options