| |
|
|
|
Improve Existing Highway – General Purpose (GP)
Lanes |
Improve Existing Highway – High Occupancy
Vehicles (HOV) |
| Factor Area / Goals and Objectives |
Do Nothing |
Alternative Mode - Transit |
Transportation Demand Management
including commuter parking lots, ramp metering,
Advanced Traffic Management Systems (ATMS) |
Major Widening & Interchange Improvements
with Property Acquisition Throughout |
Strategic Widening and Interchange
Improvements
with Limited Property
Acquisition |
Major Widening to Add HOV Lane
with Property Acquisition Throughout |
Strategic Widening to Add HOV Lane
including conversion of existing median lane to
HOV Lane in existing 8-lane section, Limited Property Acquisition |
Traffic and Transportation
Ability to solve transportation
problems
Promote safe, effective and efficient use of the transportation
system for the movement of people and goods
Provide alternatives to
travel |
- Does not address existing and future traffic needs
- Does not improve mobility or ease congestion
- Increased collision potential with increased traffic
demand
- Reduced efficiency with Do Nothing alternative
|
- Potential to partially address existing and future corridor
capacity requirements
- May improve mobility or ease congestion (dependant on modal
split achieved)
- Minor reduction in collision potential
- Should be considered as part of area-wide transportation
solution
- Provides travel choice, efficiency and effectiveness
|
- Potential to partially address existing and future corridor
capacity requirements
- Limited opportunity to improve mobility and ease
congestion
- Marginal reduction in collision potential
- Should be considered as part of area-wide transportation
solution
- Provides travel efficiency and effectiveness
|
- Most effectively addresses existing and future corridor
capacity requirements
- Improves mobility and eases congestion throughout the study
section
- Significant reduction in collision potential
- Promotes more effective and efficient travel
|
- Addresses majority of existing and future corridor capacity
requirements
- Improves mobility and eases congestion where strategic widening
improvements made
- Reduction in collision potential
- Promotes more effective and efficient travel
|
- High potential to fully address existing and future corridor
capacity requirements
- Improves mobility and eases congestion throughout the study
section
- Reduction in collision potential
- Promotes more effective and efficient travel
|
- Potential to address existing and future corridor capacity
requirements where highway widened for HOV lanes and HOV lane fully utilized
- Improves mobility reduces congestion where highway widened for
HOV lanes and HOV lane fully utilized
- Increased collision potential without buffer between HOV and
GP Lanes. Speed differential between HOV and GP lanes creates increased
potential for more severe collisions
- Promotes more effective, efficient travel
|
| Traffic and
Transportation |
 |
|
 |
|
|
|
— |
Natural Environment
Minimize negative environmental effects and
mitigation |
- No impacts except reduction in air quality with increased
severity and duration of congestion
|
- Variable impacts (dependant on nature, extent and location of
transit infrastructure requirements).
|
- Minor impacts related to removal of vegetation with the
construction of commuter parking lots, queue jumping lanes and the installation
of traffic management systems
|
- Significant impacts on watercourses with wider crossings, more
vegetation removed for construction, more quantity and quality control needed
for runoff from impervious surfaces
|
- Moderate impacts with wider crossings on some watercourses,
some vegetation removed in areas of widening and quantity and quality control
needed for runoff from impervious surfaces
|
- Significant impacts on watercourses with wider crossings, more
vegetation removed for construction, more quantity and quality control needed
for runoff
|
- Moderate impacts with wider crossings on some watercourses,
some vegetation removed in areas of widening and quantity and quality control
needed for runoff from impervious surfaces
|
| Natural
Environment |
|
— |
— |
|
|
|
|
Social / Cultural Environment
Support measures by the City to manage
transportation
Minimize environmental effects and mitigation
|
- Increasing delays to emergency services as a result of
increasing congestion
- Does not support planned growth
|
- Variable impacts (dependant on nature, extent and location
transit infrastructure requirements)
- Alone, does not support planned growth
|
- Limited social impacts related to the location and extent of
any TDM measures
- Alone, does not support planned growth
|
- Potential impacts on heritage structures adjacent to
corridor
- Greater pavement area may result in removal of landscaping
significant social impacts
- Supports planned growth
|
- Potential impacts on heritage structures adjacent to corridor
in areas of widening
- Greater pavement area may result in removal of/less
landscaping
- Supports planned growth
|
- Potential impacts on heritage structures adjacent to
corridor
- Greater pavement area may result in removal of/less landscaping
significant social impacts
- Supports planned growth
|
- Potential impacts on heritage structures adjacent to corridor
in areas of widening
- Greater pavement area may result in removal of/less
landscaping
- Partially supports planned growth
|
| Social / Cultural
Environment |
|
— |
— |
|
— |
|
— |
Land Use and Property
Support measures by the City to manage
transportation
Minimize environmental effects and mitigation
|
- No property required
- No support for City policies
|
- Variable property required (dependant on nature, extent and
location of transit infrastructure requirements)
- Partial support for City policies
|
- Minor property required, depending on the extent and nature of
the TDM measures
- Partial support for City policies
|
- Significant property required (in excess of 300 homes,
businesses, institutions, parks, etc.) for highway widening and stormwater
management facilities
- Not supportive of City policies
|
- Limited property required (about 15-40 homes businesses,
institutions, parks, etc. for highway widening and stormwater management
facilities, depending on specific details)
- Support for City policies
|
- Significant property required (in excess of 300 homes,
businesses, institutions, parks, etc.) for highway widening and stormwater
management facilities
- Not supportive of City policies
|
- Limited property required (about 15 – 40 homes businesses,
institutions, parks, etc. for highway widening and stormwater management
facilities, depending on specific details)
- Support for City policies
|
| Land Use and
Property |
|
— |
|
|
— |
|
— |
Cost
Promote efficient use of the transportation
system
Analysis of engineering features, construction cost |
- Increased maintenance and associated staging costs
|
- Variable capital cost (dependant on nature, extent and location
of transit infrastructure improvements)
|
- Low to moderate capital costs related to car pool lots,
advanced traffic management systems, etc.
|
- High capital cost related to full length widening with
structure replacements, retaining walls, etc.
|
- Moderate capital cost related to widening in areas of existing
6- lanes only
|
- Highest capital cost of road improvement options (HOV buffer
zones add to the widening requirements for GPLs)
|
- Moderate capital cost related to widening in areas of existing
6-lanes only and conversion of GPLs to HOV lanes
|
| Cost |
|
— |
|
|
— |
|
— |
| Recommendation |
Carried Forward
for comparison purposes |
Not Carried Forward as a Stand Alone Alternative
(Transit usage
targets are included in all scenarios) |
Not Carried Forward as a Stand Alone Alternative
(TDM/ATMS
included in all scenarios) |
Not Carried Forward |
Carried Forward
(includes TDM/ATMS measures and transit
usage targets) |
Not Carried Forward |
Not Carried Forward |
