The Transportation Element is an important component of the Comprehensive Plan. It sets a framework for understanding, prioritizing, measuring, and constructing a multimodal transportation network to help DuPont achieve its goals.

The Transportation Element’s goals and policies, technical analysis, and projects are the foundations for how DuPont will address future public and private development within the city. It directs spending for capital facilities improvements associated with Transportation.

A Comprehensive Plan is a long-term framework that is the centerpiece of local planning efforts. The 20-year plan articulates a community vision that guides decision-making to address growth and coordinate capital investments.

Required elements of the Comprehensive Plan include:

• Land Use,
• Housing,
• Utilities,
• Transportation, and
• Climate Change and Resiliency.

This website will focus on the Transportation Element. Other Elements are concurrently under development. Read more about them in the Comprehensive Plan Webpage below!

The following are some goals for the transportation network in DuPont based on community priorities. When decisions are made or projects are planned, they are done keeping in mind their relevance to these goals!

DuPont, and Washington as a whole, is experiencing significant growth that is expected to continue over the next two decades. As part of its growth management strategy, DuPont intends to invest in the active transportation network to safely accommodate people biking, walking, or rolling. DuPont will prioritize projects that will adequately manage the expected 20-year growth.

The following section discusses Driving, Walking and Biking in DuPont in 2044 against existing conditions. Any deficiencies identified in the analysis associated with each mode is addressed in the project list to ensure DuPont continues to function well in line with the goals discussed above.

Level of service (LOS) is a term that traffic engineers use to describe intersection performance. This tells the City if an intersection is performing poorly.

Are drivers waiting too long for a signal to turn green? Could this lead to a driver taking a risk and causing a safety issue? These are the situations that the City aims to avoid.

LOS is reported on a scale from A to F, as shown in the graphic below. DuPont's existing and future roadway network performance was analyzed using this metric.

All studied intersections are shown in the map below (including future intersections). All intersections in the city are currently operating at LOS A-C for 2024, but some intersections are expected to perform at LOS E in 2044.

DuPont's proposed project list will address these poorly performing intersections so people who live in and visit DuPont continue to experience a well-performing roadway network through 2044.

DuPont already has a well connected sidewalk network with few gaps and deficiencies. But quantity does not sufficiently encourage walking. In the TE, the focus for network development is on the quality of the facility by adopting design-based standards. Sidewalks along arterials and collectors are planned to meet a standard of a five feet planter buffer along with a minimum five feet sidewalk width.

The map below shows where the pedestrian network does not conform to this standard now and improvements through 2044.

Level of Traffic Stress (LTS) is a measure used to gauge active transportation infrastructure. The lowest level of traffic stress is classified as LTS 1, where a wide range of users feel safe and comfortable on an active transportation facility. LTS 4 represents the highest level of traffic stress where most users feel uncomfortable when biking. Bicycle Level of Traffic Stress is determined by facility type, speed limit, and annual average daily vehicle traffic. The graphics below discuss each LTS category. LTS can also apply to the pedestrian network.

DuPont has committed to achieving an LTS of 2 or better for all bicycle facilities running along or parallel to the City's arterial and collector network. In cases where it is not feasible to achieve LTS 2 due to practical concerns, the City has identified an alternative parallel corridor for a bicycle facility.

These maps compare the BLTS of DuPont's bike network now with the proposed 2044 network. This improvement is achieved through planned facilities which are shown in the project list section below.

The two facilities along McNeil Street and Bobs Hollow Lane which do not meet standards have parallel trails next to them to complete the low stress network.

The Projects in the Transportation Element are planned based on technical analysis, community priorities and funding availability for all modes of transportation.

For example, a level of service analysis for an intersection can identify future congestion and failure. This can be used to develop solutions that coalesce into the transportation element project list.

A draft list of projects was developed based on the discussion surrounding the modes above. In the map below, please find these projects highlighted - each marker represents a project along that roadway. You can click on a marker and read the description of a project that interests you.