16th Avenue SW: SW 100th Street to SW 107th Street Pedestrian Safety Improvements & Traffic Calming Project

Project map

The yellow section on the map (16th Ave SW between SW 100th St and SW 107th St) will be repaved and will get a "road diet" to calm traffic and help make the street safer for pedestrians. The areas marked with orange dotted lines (SW 100th St and White Center Cutoff) will also be repaved, but no other changes will be made there.

View larger image of the map (157 KB)

What to expect during night work in July and August 2025

When:

• Paving is expected to begin in mid-July. The work should take 3 weeks, but it could last longer if crews run into bad weather or equipment problems.

Work hours:

• Crews will work at night, Monday through Friday. They will start at 6 p.m. and finish by 4 a.m. the following day.

16th Ave SW will stay open:

• Traffic can still move through the area during construction. Crews may close one lane at a time, but vehicles will be able to pass through safely.

Lights:

• Crews will use bright lights to help them see and stay safe while they work.

Traffic:

• Doing the work at night helps keep traffic moving during the day.

Parking:

• You’ll still be able to park on the street during the day. At night, some spots will be temporarily blocked where crews are working.

Noise:

• Some of the work may be noisy. Crews will move along the road, so the noise won’t last long in one spot. We’ll have earplugs available for nearby residents who need them.

What to expect during daytime work after paving is complete

August to September 2025: Daytime road work on 16th Ave SW

Once paving is done, crews will return to finish other safety improvements. Work will happen Monday through Friday during the day. Here’s what to expect.

Work dates:

• This phase will start in August or early September, depending on when paving is finished. Work will take about six weeks to complete. It could last longer if there is bad weather or equipment breakdowns.

Work hours:

• Crews will work from 7 a.m. to 3 p.m. each weekday. Permanent striping will be done overnight on two nights.

The road will stay open:

• Traffic can still move through the area during construction. Crews may close one lane at a time, but vehicles will be able to pass through safely.

Noise:

• You may hear noise from construction equipment like trucks, generators, grinders, and rollers.

Parking:

• Street parking will be limited during active construction. Crews will reopen parking spots as soon as they finish in each area.

Sidewalks:

• Most of the work will happen in the road, but some sidewalks may close for short periods. Signs will show where to walk safely.

Access to businesses and homes:

• Crews may block driveways for short periods. They will work quickly to reopen access.

Dust:

• Some dust is normal during road work. Crews will use water and other tools to keep it down.

Garbage and mail: 

We don’t expect any changes to garbage pickup or mail delivery. These services will be notified about the work.

• Crews will work efficiently to finish the project as quickly as possible.
• We’ll post regular updates on this website to keep you informed.
• Have concerns or questions? Contact us anytime at AskLocalServices@kingcounty.gov or 206-477-3800.

We appreciate your patience while we improve the road and make it safer for pedestrians.

Safety improvements coming to 16th Avenue SW

This project will calm traffic and improve pedestrian safety by providing the following:

• One lane in each direction
  This will help prevent speeding by slowing down traffic and makes crossings safer for people walking.
• Center turn lane
  Provides a safer place for drivers to make left turns. This will allow traffic to move freely in the main travel lane.
• Sidewalk curb extensions at SW 104th Street and SW 106th Street intersections
  There are no traffic signals at these two intersections to stop traffic. Sidewalk curb extensions will help drivers see people walking in the crosswalk. The extensions also will shorten the distance people need to cross.
• Rapid flashing lights and new pedestrian crossing signs at intersections that do not have a traffic signal
  Flashing lights and high-visibility signs will alert drivers when pedestrians are crossing 16th Avenue SW at SW 104th and SW 106th Street.
• Bicycle lanes in both directions
  New, five-foot (5-foot) wide bicycle lanes will separate bike riders from motor vehicle traffic. This will give people on bikes or other active transportation more room so that they don’t have to share the road with cars. 
• Two feet of extra space (buffer zone) on both sides of bike lane 
  Cyclists feel more comfortable and secure when they are not too close to moving traffic or parked cars. A two-foot (2-foot) wide buffer zone on both sides of the bike lane could help encourage more people to choose biking or other types of active transportation to get to where they want to go.

Parking changes

Currently, there are 43 parking spaces on 16th Avenue SW between SW 100th and SW 107th streets. The total number of parking spaces in the project area will increase to 46, but some will be in different places than before. For instance, some parking spaces that are currently located on the west side of the road will be moved to the east side. This shift is necessary to accommodate new bike lanes, sidewalk curb extensions, and safety improvements.

Striping and parking between SW 107th and SW 106th St. View larger (8MB)

Striping and parking between SW 106th St and SW 104th St. View larger (8MB)

Striping and parking between SW 104th St and SW 102nd St. View larger (8MB)

Striping and parking between 102nd St and SW 100th St. View larger (8MB)

Striping and parking at SW 100th St and White Center Cut-Off. View larger (8MB)

View PDF with all combined striping and parking maps (32MB)

Get involved!

Community feedback is important for improving our collaboration on this road safety project and other King County projects. Below are ways you can get involved.

• Sign up for Road Alerts to get emails or text messages about this project and others in White Center. 
• Meet with the team. Contact us to schedule a phone call, Zoom meeting or in-person meeting with our project staff. Email: AskLocalServices@kingcounty.gov or call 206-477-3800.
• The Department of Local Services occasionally hosts community meetings to discuss projects and programs that are important to the White Center community. If you or someone you know would like more information, contact us at AskLocalServices@kingcounty.gov or call 206-477-3800.

Project timeline

• Fall 2021: Preliminary design complete
• Spring 2022: Initial public outreach and comment period complete 
• Winter 2024: Final design complete 
• 2022 through 2025: Ongoing public outreach
• March/April 2025: Drainage pipe replacement on SW 104th St (between 15th Ave SW and 17th Ave SW) View project flyer (750 KB) 
• July/August 2025: Road paving and temporary lane striping, including bike lanes
• August/September 2025: Curb extensions, permanent lane striping and additional pedestrian safety improvements. Work could start in late July and will last approximately six weeks. 

Existing roadway layout 

The image above shows what 16th Avenue SW between SW 100th and SW 107th streets look like today. The road currently has two travel lanes in each direction and a center turn lane. There are no bicycle lanes on this road. View larger image (55KB)

Google Earth photo of 16th Ave. SW between SW 107th and SW 102nd streets looking north (photo taken in 2022). The existing road layout is built more for car traffic than people walking or biking. 

Higher speeds can result in more collisions with pedestrians.

Roads with a single travel lane in each direction and a center turn lane have slower, calmer traffic. This is important for pedestrians and cyclists because slower vehicle speeds make it safer, reducing the risk of injury and death.

• Fewer travel lanes make it safer to cross the street and allow room for sidewalk curb extensions and buffered bicycle lanes.
• Sidewalk curb extensions reduce the crossing distance for pedestrians in the crosswalk.
• Extra space, or buffer zone, on both sides of the bicycle lane provides a dedicated place for non-motorized traffic.

Project budget and funding

The total estimated project cost is $1.9 million. The project is funded by COVID Relief grant money, a grant from the national Highway Safety Improvement Program, and local funds.

Community involvement 

Early project design - Winter and spring 2022  

The county worked with community members, businesses, and residents throughout the project. We joined community meetings and White Center events and also ran two major outreach campaigns. We conducted two online surveys—one early in the design process and another at the final stage.
 
King County conducted an outreach campaign and survey to collect input from over 800 community members. Two potential project design options were presented to the community for their consideration. 

1. Design option 1:
   • One travel lane in each direction and a center turn lane
   • Dedicated lanes for bicycles in both directions.
   • No change to on-street parking. Same number of existing parking spaces (46 spaces).
2. Design option 2:
   • One travel lane in each direction and a center turn lane
   • No dedicated lanes for bicycles.
   • Adds more street parking on both sides of the road.

Over half of the survey participants chose Design option 1 the best fit for the community’s needs. As a result, the County proceeded with this chosen design.

Late project design – Summer 2024

We held a community outreach meeting on July 24, 2024, and conducted a survey in July and August 2024. Slightly more than half of the 806 responses we got supported including bike lanes in both directions, along with other pedestrian safety and traffic calming measures included in the final design. 

• Contact us for survey results, or if you would like a copy of the 2024 community meeting presentation. 

Why the county decided to include bike lanes

Our goal is to help everyone, including people who need extra time in the crosswalk, to get across the road safely. We added bike lanes along with curb extensions and bright yellow flashing signs to help slow down traffic and protect people from the danger of getting hit by a moving vehicle.

Our decision-making process focused on saving lives and listening to what the community had to say. We also paid attention to concerns about parking, especially from businesses in downtown White Center.

During the early design phase in winter and spring 2022, we gave the community two options. One included bike lanes and about the same amount of parking as now. The other option had more parking but no bike lanes. Both options got almost the same level of support, but more people said they wanted bike lanes. Because of this, and advice from traffic safety experts, we decided to add bike lanes to the project.

In July and August 2024, the project design was nearly finished. We held another project survey to make sure residents, workers, and business owners were aware of the project, and to see if our decision to include bike lanes still met the needs of the community. The feedback showed that just over half supported bike lanes in both directions. This matched what we heard in 2022.

While surveys give us helpful information, they aren't always perfect. Since our main goal is to keep everyone safe, and bike lanes have been shown to reduce accidents and make traffic flow better, we decided to move forward with the current design that includes bike lanes.

What we heard

There is strong support for slowing traffic and making this busy road safer for everyone—drivers, pedestrians, cyclists, and scooter riders. Additionally, residents expressed the need for more on-street parking, especially in front of businesses without parking lots.  

Concerns were also raised about ensuring long-standing residents and businesses maintain a strong sense of belonging in the area.  

What we are doing

This project gives us an opportunity to make 16th Avenue SW safer for everyone. The county has decided to proceed with the current design, which includes bike lanes.  

Bike lanes, along with the other pedestrian safety improvements, help reduce the chances of accidents between vehicles and people on foot, bicycle or scooter.  Bike lanes also keep bicycles off the main road, which helps traffic flow more smoothly and safely.