SEATTLE — There could soon be more intersections in Seattle where pedestrians get a few seconds head start before cars.

The concept, which is called leading pedestrian intervals, re-times walk signals to give pedestrians three to seven seconds of time in the crosswalk before turning traffic gets a green light.

There’s about 50 intersections with leading pedestrian intervals now, but the Seattle Department of Transportation hopes to have at least 150 by 2021, according to a Tuesday blog post.

The overall goal is to improve pedestrian safety. SDOT cited a Federal Highway Administration study that found leading pedestrian intervals lead to a 60% reduction in pedestrian-car crashes.

In 2017, 62 pedestrians were seriously injured in a collision in Seattle, and 11 were killed, according to SDOT. While these numbers are the highest Seattle has seen in 12 years, the rate of pedestrian-involved crashes per 100,000 people has declined.

To help expand leading pedestrian intersections in Seattle, the city says it recently adopted a new policy where it will re-evaluate an intersection for a leading pedestrian interval every time there’s a new signal or they do maintenance. Officials will make the change unless there’s a good reason not to at that spot.

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SDOT plans to use $1.65 million in grant money from the state Department of Transportation to fund the change.

Leading pedestrian intervals is just one strategy the city says its using as part of its Vision Zero campaign, which aims to end serious injury and fatal crashes in Seattle by 2030.