8.1%. That is the discount one study found for single-family homes fronting or sitting next to a high-traffic street, across almost 10,000 sales. Every listing agent in Los Angeles has felt that number without ever seeing it written down.
So when the city starts photographing speeders on 125 stretches of road, the obvious question is whether the discount shrinks. Nobody knows yet. I could not find a single study, in any country, that measures speed cameras against home prices directly. Anyone quoting you a percentage is guessing.
What does exist is a deep body of research on the things a camera is designed to change. Speed, noise, safety, and whether a street feels like somewhere you would walk.
The busy street discount is real
James Larsen's 2012 study of 9,670 sales found that 8.1% discount, and that doubling traffic volume on a street cut prices by about 2.1% on average. A follow-up with John Blair found single-family homes on arterials sold at a 7.8% discount compared with homes on collector streets.
That same study has a twist. Multi-unit rental buildings on arterials sold at a 13.75% premium. For an apartment building, the boulevard is visibility and access. Same street, opposite verdict, depending on what you are selling.
Closer to home, a 2012 study of 4,715 homes along the freeway corridor from the ports to downtown LA estimated that a 1% increase in truck traffic took $2,000 to $2,750 off a $420,000 house located 100 to 400 meters from the freeway.
Noise is the part you can price
Economists have been putting a dollar figure on decibels since the 1980s. Jon Nelson's classic review found a mean of about 0.4% of value lost per decibel of highway noise. A 2025 NBER working paper by Enrico Moretti and Harrison Wheeler, which is not yet peer reviewed, put the average price of a decibel at 0.94%, and found home prices within 100 meters jumped 6.8% after new noise barriers went up.
Faster traffic is louder traffic. A camera that convinces drivers to do 35 instead of 50 is, among other things, a noise policy.
When traffic changes, prices follow, slowly
The best evidence comes from places where something changed overnight. When The Hague opened a bypass, researchers found a 50% cut in traffic density raised nearby prices about 1.4%. After London's congestion charge, home values moved about 0.3% for every 1% change in traffic, and by one 2021 estimate homeowners in the zone gained more than 3.8 billion pounds. In Portland, traffic calming projects that cut traffic 16% raised values on the treated streets by about 1%.
Notice the size of those numbers. Real, measurable, and modest.
Not all calming is a gift
One more wrinkle. A 2019 study found speed bumps were associated with lower residential values, and an older study of speed humps in Georgia found effects that were fairly random and insignificant. Nobody wants the thud outside the bedroom window.
That is the interesting thing about a camera. It slows cars without a piece of asphalt in front of anyone's driveway. The fine money, by law, eventually funds physical traffic calming, so some streets will get the hardware too. I covered where that money goes separately.
Walkability is the long game
Joe Cortright's 2009 study for CEOs for Cities found each additional Walk Score point was associated with $700 to $3,000 in home value. Redfin's 2016 analysis put a point at $3,948 in Los Angeles, at 2014 to 2016 prices.
A camera does not move a Walk Score, which measures distance to things. But it can change whether people walk. In NAR's 2026 Community and Transportation Preferences Survey, 39% of respondents said not feeling safe because of traffic keeps them from walking, and nearly two-thirds said they would pay more to live somewhere walkable.
What I would tell a client
If you own on a camera corridor, do not price the camera into this year's listing. The research says calmer streets are worth something, the effect shows up over years, and it is specific to the street. Cameras also go after speed, not volume, and volume is most of what that 8% discount measures.
If you are buying on one, treat the camera as a nice-to-have, not a reason to stretch on price. Nobody knows yet what it is worth. And if you are an agent, the useful thing is knowing these numbers before a client asks, which is roughly my whole business model.
A camera will not turn Olympic Boulevard into a cul-de-sac. But if it turns a 50 mph boulevard back into a 35 mph one, the research says that is worth real money. Just not by Christmas.
These are summaries of published research, not an appraisal or investment advice. The studies cover other cities and time periods, several are working papers or dissertations, and results in Los Angeles may differ.
