SOURCES SOUGHT
A -- Field Evaluation of Double Crossover Diamond Interchanges
- Notice Date
- 3/1/2010
- Notice Type
- Sources Sought
- NAICS
- 541990
— All Other Professional, Scientific, and Technical Services
- Contracting Office
- Department of Transportation, Federal Highway Administration (FHWA), Office of Acquisition Management, HAAM, Mail Stop E65-101, 1200 New Jersey Avenue, SE, Washington, District of Columbia, 20590
- ZIP Code
- 20590
- Solicitation Number
- DTFH61-10-R-00018
- Point of Contact
- Lise S. Lyles, Phone: 202-366-4229, Rick Murray, Phone: (202) 366-4250
- E-Mail Address
-
lise.lyles@dot.gov, rick.murray@dot.gov
(lise.lyles@dot.gov, rick.murray@dot.gov)
- Small Business Set-Aside
- N/A
- Description
- Potential Sources Sought. This is not an RFP. The Federal Highway Administration (FHWA) is conducting as market survey to identify potential sources that can provide the technical expertise for field evaluation of double crossover diamond interchanges (DCD) in accordance with the Scope of Work herein. Background Many in-service diamond interchanges are approaching or have exceeded their design traffic capacity. Some sit at strategic locations on the local freeway and major arterial network. Congestion at these locations can create bottle necks that deteriorate the level of service for a large portion of the area transportation network. There is an urgent need to upgrade the traffic carrying capacity of these interchanges to alleviate congestion and improve air quality, not only locally but also system wide. Increasing interchange throughput can be accomplished by adding lanes or replacing interchanges. These are major construction projects that are typically high cost. Throughput can also be achieved through the combination of innovative channelization, signing, and signal timing, which requires intimate knowledge of the traffic pattern at the site of interest, but can be done at much lower cost. We define the latter as non-conventional approaches. Non-conventional approaches capable of delivering the same level of capacity increase, but at significantly lower costs, are expected to gain more and more attention as DOTs seek to provide the best level of service at the lowest cost to the public. One such non-conventional approach is the double crossover diamond interchange (DCD) also known as diverging diamond interchange (DDI). It was originated and first implemented in France. The idea is to combine the left turn and through traffic, thereby eliminating the need for a left turn lane and protected left turn phase. A DCD channelizes vehicular traffic on a grade separated crossroad from the right side of the road to the left side at the first ramp terminal, and channelizes the traffic back to the right side at the second ramp terminal. Within the two ramp terminals, the left turning traffic moves with the through traffic, and can enter the freeway without restriction. A DCD utilizes the entire length of the freeway overpass or underpass as storage space for left turning traffic entering the freeway. It is estimated that reducing the number of signal phases and allowing left turn and through traffic to move simultaneously during the green phase will increase the interchange throughput, and reduce crashes by reducing the number of conflict points. According to FHWA research, the DCD design increases capacity up to 30%. A DCD is especially suitable when left-turn volumes are high and opposing traffic on the crossroad is unbalanced. In the United States, the first diamond interchange converted to DCD is located at I-44 & US13 in Springfield, MO. It was opened to traffic in June, 2009. Two DCDs - Route 60 & National Ave. in Springfield, MO, and I-15 & Main St in American Fork, UT, are currently under construction and planned to open to traffic in late summer or fall of 2010. Three additional DCDs, I-270 & Dorsett Rd in St. Louis, Mo, I-435 & Front Street in Kansas City, MO, and I-590 & Winton Rd in Rochester, NY, are planned for construction in 2010 and 2011. Definition In this statement of work, before period is the time frame of at least one month prior to the start of construction or major preparation work at a DCD site that results in changes to the traffic pattern; transition period is the time frame between 0 to 3 months after a DCD has been fully open to traffic; and after period is the time frame after a DCD has been fully open to traffic for 3 months. Note: Fully open to traffic means all types of construction equipment are removed, all traffic signs and pavement markings are in place, and there are no signs of work zone. Special Notes to Offerors In this statement of work, various types of data collection needs are described. These data elements are to be used in conducting practical and objective field evaluation of the operational and safety impacts of DCD. The offerors are encouraged to propose more or less, or alternative types of data collection needs, and explain the reason(s) in support of the proposed evaluation methodology. When proposing specific types of data collection technologies to meet the evaluation needs, the offerors are advised to think carefully about how each type of data will be collected and used, team members' experience with the proposed equipment, the level of R&D work needed to ready the data collection system, and especially the level of labor effort required to reduce and archive each type of data. The general direction is to collect the right amount of data at the right locations during the right periods of time. For crash data collection, reference sites are required to provide a baseline of the local crash trends. The number of reference sites proposed may impact the proposed budget. The offerors should balance the needs of accuracy and cost when proposing the required number of reference sites for each DCD. Objectives The objectives of this contract are to evaluate the operational and safety impacts of converting an existing diamond interchange into a DCD through before and after study, and investigate how accurately the field observed traffic conditions at the DCD sites can be replicated in microscopic simulation in VISSIM. Scope Evaluate 6 DCD sites: Site 1. I-44 & US 13 in Springfield, MO Site 2. Route 60 & National Ave. in Springfield, MO Site 3. I-15 & Main St in American Fork, UT Site 4. I-270 & Dorsett Rd in St. Louis, MO Site 5. I-435 & Front Street in Kansas City, MO Site 6. I-590 & Winton Rd in Rochester, NY Note: Construction of DCD site 1 was complete as of June 2009. Construction of DCD sites 2, 3, and 4 are scheduled to complete between August and December of 2010. Construction of DCD sites 5 and 6 are planned for early 2011. One or two sites may be substituted with other DCD sites depending on construction schedules. Collect the following types of field data from the six DCD sites: 1. Operational and behavior data Peak hour queue lengths Travel times across the DCD from different directions Vehicle speed profiles at key locations Pedestrian and bicyclist behaviors, travel time, and stops Erratic maneuvers at selected locations Wrong-way maneuver at crossover locations Incidents and incident clearances 2. VISSIM simulation data As built construction plans Signal timing plans Traffic counts at different locations Vehicle speeds at different locations Vehicle travel times through different links 3. Safety (Crash) data Five years before crash data from DCD sites Two year after crash data from DCD sites Seven years crash data from specified number of reference sites Requirements: For video data, all video footage shall display information about site location, weekday, date, and time. For VISSIM simulation data, all traffic counts and speeds must be collected simultaneously at different locations during Tuesday, Wednesday, and Thursday, then averaged. Produce the following documents: 1. Work Plan 2. Summary Report on Observational and Simulation Results of DCDs, based on data collected from DCD sites 1, 2, 3, and 4. 3. Summary Report on Operational Evaluation of DCDs, based on data collected from DCD sites 5, and 6. 4. Summary Report on Safety Evaluation of DCDs, based on data collected from all 6 DCD sites. THE FOLLOWING SKILL TYPES ARE ANTICIPATED FOR THIS EFFORT: • Technical Specialists and/or Experts in. o Safety evaluation of interchanges o Operational evaluation of interchanges o DCD design concept and features o Intersection Safety o Pedestrian/bicyclist safety at and near interchanges o Driver reaction to "un-expected" channelization guidance o Pedestrian/bicyclist behavior o Contract/Project management involving multiple parties • Intermediate Technical Specialists o Interchange geometrical design o Traffic signal timing and coordination for un-usual settings o Signing and pavement marking o Traffic operational analysis and simulation o Incident detection and clearance operation • Technician / Graduate Student o Traffic data collection and reduction o Travel time collection or estimation o Video monitoring, recording, and editing o Video and data files archiving o Data coding and summary o VISSIM calibration • Statistician / Analyst o Comparative statistical analysis of crash data • Technical Writer o Technical report editing and formatting Period of Performance The period of performance for this contract shall be 56 months. Place of Performance The location for meetings or demonstrations with the US DOT is the Turner-Fairbank Highway Research Center in McLean, VA. RESPONSES TO THIS NOTICE: Any interested organizations are invited to submit a response to submit a Capability Statement by March 17, 2010, by e-mail to Lise.Lyles@DOT.GOV. Capability Statements shall clearly identify the following items regarding the interested organization(s): (1) name and address of prospective organization(s); (2) size and socio-economic status; (3) technical capabilities to perform the work; (4) relevant experience and credentials; (5) synopsis of experience and expertise of potential staff; (6) relevant projects completed related to the anticipated objectives of the project with information on the client, scope, and products; and (7) a description of available facilities to perform the work outlined above. The Capability Statement shall be no more than 10 pages in length single-spaced with font size twelve or larger. For questions concerning this announcement contact Ms. Lyles at 202-366-4229. This Sources Sought Notice is not to be construed as a commitment on the part of the Government to award a contract nor does the Government intend to directly pay for any information or responses submitted as the result of this Sources Sought Notice.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/DOT/FHWA/OAM/DTFH61-10-R-00018/listing.html)
- Record
- SN02079691-W 20100303/100301235233-4d1da7458a7bc1d5ae2c7606cff2520a (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
(may not be valid after Archive Date)
| FSG Index | This Issue's Index | Today's FBO Daily Index Page |