Sagebrush Drive Reconstruction Project
The project is approximately 0.6-of-a-mile long and consists of the upgrading of the existing Sagebrush Drive, from FM 2499 to Old Settlers Road from a narrow two-lane asphalt open section roadway to a two lane concrete curb and gutter street. Components of the project includes upgrades the existing traffic signals at both the intersections of FM 2499 and Old Settlers Road along with the additions of both dedicated right and left turn lanes. Dedicated left turn lanes are also being added at the Devonshire intersection. Both curbed and flush stamped colored medians are also components of the paving portion of the project. The project also includes drainage upgrades that include replacing an existing undersized drainage structure crossing and the replacement of the existing street drainage ditches with a buried storm water system with curb inlets. To address pedestrian traffic the installation of sidewalks on both sides of the street are also components of the project.
Factors Driving Upgrades
There are three main factors for driving the upgrades to Sagebrush Drive: safety, speed control and mobility. Throughout the process the Town heard the roadway was dangerous, too narrow and two vehicles, especially two buses, could not pass each other without at least one of them driving off of the roadway surface. In addition, students were observed both walking and skateboarding along Sagebrush during school times, intermingling with heavy roadway traffic. To get out of the street, they were required to walk either in the bar ditch or up on private property to avoid traffic. Historically, Sagebrush Drive has been a location that is known for speeding. Sagebrush Drive is a direct connect from FM 2499 to Flower Mound High School and, visually, is long and straight. Young and inexperienced drivers, on a long straight section of roadway, often speed.
Additionally, with recent addition of the 9th Grade Center to the southern portion of the Flower Mound High School campus, Sagebrush Drive is the most direct route for parents to drop off their freshmen. With the addition of sidewalks, the school zone on Sagebrush Drive is being upgraded to a school zone flasher instead of a static sign and relocated further east. In addition, this project will add street lighting to a dark street at night increasing safety as well. The mobility upgrades come in the form of intersection improvements at both ends of the project with the addition of exclusive turn lanes.
Factors Determining Reclassification from Residential to Urban Collector Street
The initial look at determining the need to change Sagebrush Drive from a Local Residential street to an Urban Collector was brought forward by the Transportation Commission. At the joint meeting between the Transportation Commission and Town Council, staff was asked to look at east/west connectors between FM 2499 and Old Settlers with the northern boundary being FM 1171 and the southern boundary being Flower Mound Road.
As such, the East/West Connector study was completed and presented to the Transportation Commission in a July 2013 Work Session to determine feedback on how to proceed. The East/West Connector study identified two possible east/west connection being Sagebrush Drive and the Firewheel Extension. As part of that study, it collected traffic volume counts indicating there were more than 4,200 vehicle per day (vpd) traveling along Sagebrush Drive. Traffic volume is an important basis for determining what improvements, if any, are required.
Based on the Town’s SMARTGrowth manual, the upper limit of the level of service C (LOS C) for an Urban Collector is between 6,000 – 7,000 vpd. The typical upper limit of a local residential street is considered 1,200 vpd. Four east/west connector alternatives were considered:
- A 2-lane Sagebrush Drive
- A 4-lane Sagebrush Drive
- A 2-lane Sagebrush with a 2-lane Firewheel Extension to Old Settlers
- And a 2-lane Sagebrush Drive with a 2-Lane Firewheel Extension to Sagebrush Drive and a potential roundabout at the intersection of the two
Based on resident concerns, cost and trip reduction, the 2-lane option was ultimately recommended. Once the 2-lane solution was determined, Council ask staff to “think outside the box” for the best solution. Three options were discussed:
- Urban Collector with a two-way left-turn lane (TWLTL) in the middle
- A Modified Urban Collector with Medians
- And a 2-Lane Residential Estate
The determining factor for selecting the Modified Urban Collector is that it provided the best overall benefit for mobility, safety (vehicular and pedestrian), speed control, and least impact on tree removal out of the three options. The more traditional Urban Collector with the addition of the TWLTL visually was a wider, straight, more prone to speeding option which would have had greater impact to the residents as the cross section is 37 feet from back of curb to back of curb. This would have removed more trees than the Modified Urban Collector. The Local Residential Estate would have been less pavement than the Urban Collector (26-feet in width) but would have impacted trees with the 17 foot drainage ditches on either side. This would have again impacted more trees plus did not have a provision for sidewalks for pedestrians. If sidewalks were to be added another 5 – 8 feet outside of the drainage easement would have been required and even more trees impacted.
Medians Are Major Component of Project
Example of Flush Stamped Concrete Media Medians are an important component of the project for two reasons: separation of traffic flows at intersections and for speed control. Medians installations are an integral part of the dedicated left turn lane installations at FM 2499, Old Settlers, and Devonshire. In addition, medians serve as a form of traffic calming for the roadway. When a roadway is no longer visually straight and friction points added to the roadway, this tends to make the traffic slower and safer. Many of the resident’s concerns were with the speed at which motorists drive this roadway. They will allow for future locations where the roadway can be made more aesthetically pleasing with the planting of ornamental type trees can also help break up the visually long areas of Sagebrush Drive. The negative to medians is access to property. The initial concept plan included longer medians and more raised sections of medians. Through the design process, the concept plan was refined. Because of that input, various locations were identified for flush medians and wider median openings to accommodate local resident needs. The net result of the design meetings was that all residential driveways were able to have ingress and egress access through the proposed median openings.
Public Meeting, May 22, 2014 (30%)
The Town held a public meeting on May 22, 2014 at Fire Station 1 from 6:00 pm to 8:00 pm. The 30% plans were presented. Below are links to the presentation and schematic used at the meeting.
30% Roadway Plan
Public Meeting, August 25, 2014 (60%)
The Town held a public meeting on August 25, 2014 at Fire Station 1 from 6:00 pm to 8:00 pm. The 60% plans were presented. Below are links to the presentation and schematic used at the meeting.
60% Roadway Plan
Public Meeting, January 28, 2015 (90%)
The Town held a public meeting on January 28, 2015 at Fire Station 1 from 6:00 pm to 8:00 pm. The 90% plans were presented. Below are links to the presentation and schematic used at the meeting.
90% Roadway Plan
The project will complete the section improvement per the Thoroughfare Plan connection from Old Settlers to FM 2499. This project includes concrete curb and gutter pavement, medians, sidewalks, storm drainage, signing and striping.
The roadway will be constructed to a modified urban collector, as shown on the exhibit below.
The project is out for contractors to review and prepare bids. The bids will be opened on May 6, 2015 at 2:00 pm. The contract award will go to council on June 1, 2015. The link provided below will show the plans that are out for bid.
(Large file -- will take a few moments to load)
NOTE: The 100% Plans link does not provide the necessary information for the bid process. Please visit the Town of Flower Mound Purchasing Portal for the complete bid packet.
Resident feedback is always encouraged regarding projects that impact our community.
Public meetings were held for this project at the 30%, 60%, and 90% stages to gain input on the roadway features.
For further information or questions on the project, please contact David Bauer at 972.874.6308 or by email.
This information was updated on June 2, 2015.