News

Updates on the Miller Avenue Streetscape Project - July 2017

July 26, 2017

Miller Avenue road reconstruction work is on schedule and moving at a strong pace. The next few weeks of the project will include paving work in every section of the roadway, from Sunnyside to Almonte.

The majority of the road reconstruction and paving work will occur this summer so you can expect to see a new, smooth uniform surface on Miller Avenue soon.

Please note:

  • It is very important that you STAY OUT OF THE WORK ZONE:
    • Motorists: Driving in the work zone is NOT PERMITTED. Do not go around or move barricades. Police enforcement is in effect.
    • Pedestrians (including children and pets) - obey crosswalk detours and do not cross into the work zone - the hot asphalt can melt shoes and cause serious burns.
    • Cyclists - do not ride in the work zone - the hot asphalt can pop tires on contact. 
  • Miller Avenue will remain open in both directions. Expect shifting daily detours, traffic delays, and impacts to parking, side street and driveway access.
  • Please be aware of temporary gravel and rough roadway conditions. 
  • Please SLOW DOWN - Drive 15 mph in the Construction Zone. Enhanced Police enforcement of the speed limit in the construction zone is in effect.

 Thank you for your continued patience during construction. 

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Please click here to view the detailed schedule.


July 24, 2017

Paving continues in the Passage, Parkway, Gateway and Marsh. The City is using an innovative pavement recycling approach called “Cold In-place Recycling” (CIR).  CIR-FA is considered the most environmental-friendly and cost-effective method among the various in-place pavement recycling techniques.  In the CIR process, a portion of the existing asphalt is milled off, and the reclaimed material is mixed with foamed asphalt and cement then spread and compacted to produce a base layer for the final new pavement. The environmental benefits of CIR over traditional paving includes an estimated 62% savings in aggregate consumption, and a net savings in gas emissions, including 52% less carbon dioxide, 54% less nitric oxide/nitrogen dioxide, and 61% less sulfur dioxide.

Benefits of CIR Technology:

Environmental Benefits: 

The use of CIR technology in pavement rehabilitation and reconstruction has been on the rise in the last two decades because it offers many advantages that include: 

  • Conservation of natural non-renewable resources through reusing and salvaging both aggregates and asphalt in existing pavements, 
  • Reducing or eliminating disposal of old distressed pavement materials that are inherent in conventional rehabilitation methods, 
  • Full use of the materials in the existing pavement. That is, CIR establishes a “zero waste” approach to pavement rehabilitation where the entire existing asphalt concrete layer is processed and reused in-place without the need for off-site transportation of waste materials. Therefore, spoil sites do not have to be found and the volume of new material that has to be imported from quarries is minimized. For that reason, haulage is drastically reduced or totally eliminated, and as a result the overall energy consumption is significantly reduced, as are the greenhouse emissions and the damaging effect of haulage vehicles to roadways in the vicinity of the project site and traffic delays resulting from this increase in construction traffic. 
  • CIR consumes less energy due to use of in-place construction activities compared to other rehabilitation treatments, as shown in Figure 1. The energy savings (in production, transport, and placement) of various treatments compared to conventional hot mix asphalt overlay is estimated as follows:
    • Warm mix asphalt 14%
    • Hot in-place recycling 16%
    • Recycled asphalt (20%) in hot mix 21%
    • Recycled asphalt (30%) in hot mix 25%
    • Full depth reclamation with expanded (foamed) asphalt (stabilized base) 60%
    • Cold in-place recycling with Foamed Asphalt 80%   

Safety Benefits: 

  • Typically, CIR construction can proceed as fast as 1-2 lanes miles per day; thus decreasing the inconvenience to the public and exposure of construction workers compared to other more intrusive rehabilitation techniques. 
  • CIR is performed in a single pass from milling to placing using a specialized recycling equipment train, which can be accommodated within the width of one traffic lane. 
  • CIR is performed with less construction equipment on the roadway compared to other rehabilitation treatments. Additionally, fewer trucks enter and leave the project site resulting in improved traffic safety. 
  • In-place construction and relatively high production rates compared to conventional methods improve safety by reducing traffic disruption, user inconvenience, and extended exposure of construction workers and the driving public. 
  • CIR process is less intrusive to local residents, businesses and emergency vehicles. It provides for immediate access after the equipment passes. 
 




Archived Information

 

March 7, 2017

 

City Council Receives Report - Supports Work Plan
At their City Council meeting on Monday night the City Council received a report and presentation regarding the upcoming paving work on Miller Avenue, slated to begin in mid-June and early July. Repaving of the roadway is anticipated to cause disruptions and impacts to the community in regards to traffic congestion, limited vehicle access, detours and noise. As such, the project team is working to minimize impacts on residents, businesses, and commuters. One key recommendation is to conduct the paving work at night.

The City Council received an informational presentation and discussed the proposed work plan. Along with their general support of the paving work plan, Councilmembers encouraged staff to continue to outreach to the residents and businesses on Miller Avenue to inform them of the next phase of the project and anticipated schedule.


Description of Upcoming Paving Work
The roadway in the Passage, Parkway, and Gateway will receive a paving treatment that involves only the top asphalt layers, called Cold In-place Recycling (CIR). Following the completion of the two processes, the entire street will be paved with a 2 inch final layer of asphalt to provide a uniform surface.

The Main Street area (from Willow to Reed and Valley Circle) involves a more detailed paving process, known as “Full Depth Reclamation” (FDR). Basically, FDR pulverizes up to 18 inches of the underlying roadway, reuses existing ground materials and then overlays with new asphalt. FDR is 50% less expensive than traditional road repair methods, reducing excavation as well as the import and export of materials. The final road will be uniform, have a consistent cross slope, and offer a 20-year design life with regular maintenance. This section of roadway requires such a detailed paving process in order to address elevation changes to improve safety and overcome difficult soil conditions.

Paving Work Plan
Paving will occur on one side of the median at a time (inbound and then outbound), requiring traffic detours around paving work. The project team proposes to safely construct the roadway as quickly as possible to minimize impacts to the community. To accomplish this, FDR repaving work is recommended to take place at night, cutting the work time by 2-3 weeks, minimizing disruption to the community and businesses, and maximizing driveway access. Nighttime paving work is anticipated to take 3-4 weeks to complete. If the paving project is limited to daytime work only, it will take approximately 5-7 weeks.

The City will begin paving work this summer, when school is out and traffic is generally lower in Mill Valley. The proposed night work hours for the FDR paving in Main Street are from 7 pm to 9 am, with the work week beginning Sunday night at 7 pm and extend to Friday morning at 9 am. Other construction work, such as sidewalk repairs and possibly roadway paving in other areas of Miller Avenue will continue on Miller Avenue from 7 am to 7 pm, Monday through Friday. The FDR paving process will create noise mainly generated by the sound of the equipment's engine and milling teeth as they pulverize the asphalt.

Learn more:

Comments or Questions:

Please contact Danielle Staude, Senior Planner at 415-388-4033 or email dstaude@cityofmillvalley.org.