city of redlands redlands boulevard/alabama street/ colton avenue revision to intersection
DESCRIPTION
City of Redlands Redlands Boulevard/Alabama Street/ Colton Avenue Revision to Intersection Improvement Plans January 17, 2012. What ’ s the Problem?. N-S lanes are offset by 22 feet through the Alabama St./ Redlands Blvd. intersection. - PowerPoint PPT PresentationTRANSCRIPT
City of RedlandsCity of Redlands
Redlands Boulevard/Alabama Street/Redlands Boulevard/Alabama Street/Colton AvenueColton Avenue
Revision to IntersectionRevision to IntersectionImprovement PlansImprovement Plans
January 17, 2012January 17, 2012
WhatWhat’’s the Problem?s the Problem?
• N-S lanes are offset by 22 feet through the Alabama St./ Redlands Blvd. intersection.
• Traffic demands exceed the capacity of the intersection during peak hours.
• Unorthodox merge/intersection of Colton Ave. / Redlands Blvd.
Traffic Pattern TerminologyTraffic Pattern Terminology“LOS” – Level of Service (Capacity vs. Demand)
Ranges from A to F
LOS “A” – Free Flowing Traffic
LOS “C” – Occasional Traffic Restrictions
LOS “F” – Jammed Traffic Condition
SolutionsSolutions• Improve the intersection geometry of Redlands
Boulevard/Alabama Street (removes 22-foot offset).
• Improves vehicle traffic flow through intersections from a LOS “F” to LOS “C”.
• Create a signalized T-intersection for Colton Avenue/Redlands Boulevard.
Solutions (cont.)Solutions (cont.)• Incorporate value engineering to reduce
property acquisition and construction costs.
• Proposed improvements be constructed as single phase, instead of multiple phases.
ComparisonComparison
Present day
ComparisonComparison
Value Engineered Design
Value Engineered Design
(LOS “C” thru 2025)
ComparisonComparison
Present Day (LOS “F”)
Comparison - overhead viewComparison - overhead view
Present day
Comparison - overhead viewComparison - overhead view
Value Engineered Design
• By reducing a single South-bound lane a significant portion new ROW from the northeast corner will no longer be necessary.
• LOS will remain at “C” for peak hours until year 2025 rather than 2027.
Value EngineeringValue Engineering
Property Acquisition Reduction Property Acquisition Reduction Implementing Value EngineeringImplementing Value Engineering
Colton Ave./ Redlands Blvd.And
Alabama St./ Redlands Blvd.
Intersections
Ultimate Design*
Value Engineering
Design**
Cost Savings
Total $ 9,911,233 $ 8,659,447 $1,251,786
Estimated Cost and Time Estimated Cost and Time SavingsSavings
3 years reduction in time until construction
*5 lanes for all approaches at Alabama/ Redlands Blvd.**4 lanes for south-bound approach at Alabama/ Redlands Blvd.
• Authorize staff to proceed forward with the Value Engineered Design for the Redlands / Alabama / Colton intersection improvement project (LOS “C” - 2025).
• Authorize engineering service amendment with Parsons Brinckerhoff to prepare revised plans and specifications to implement the Proposed Value Engineered Design.
RecommendationRecommendation