How to Request a Speed Hump on Your Residential Street

Cars cut through your street at 40 mph to dodge a traffic light, kids play on the sidewalk, and the posted limit is 25. You have probably thought about trying to request a speed hump, then assumed the process was a maze of city forms. It is a process, but it is a predictable one, and most of the work happens before you ever contact the city.

I have helped two neighborhood groups through this, one successful and one turned down. The difference was almost entirely preparation. Here is how the process usually works, what the city will measure, and how to give your street a fair chance.

How cities decide on traffic calming

Most cities run speed humps through a neighborhood traffic calming program, usually managed by the transportation or public works department. The details vary, but the structure is similar almost everywhere:

1. A resident submits an application or request.
2. The city checks basic eligibility: street type, speed limit, and whether it is an emergency or bus route.
3. Engineers run a traffic study, usually with pneumatic tubes or a radar counter left out for several days.
4. If the street qualifies, residents are asked to sign a petition showing support.
5. Qualifying streets are ranked against others and funded as budget allows.

That ranking step is the part people do not expect. Qualifying does not mean you get a hump this year. In many cities, streets wait 6 to 18 months, sometimes longer, because there are more eligible requests than funding.

What the traffic study measures

The study decides most cases, so it helps to know what engineers look for. Typical thresholds, which vary by city, include:

• Street type. Local residential streets only. Collector and arterial roads rarely qualify for humps.
• Speed limit. Usually 25 or 30 mph.
• 85th percentile speed. This is the speed at or below which 85 percent of drivers travel. Many programs require it to be at least 5 to 10 mph over the limit.
• Daily volume. Often between about 500 and 3,000 vehicles a day. Too few cars and the problem is not considered widespread; too many and the street may be classed as a through route.
• Grade and layout. Steep hills, sharp curves and short blocks can rule out humps for safety or drainage reasons.

Notice that the measure is the 85th percentile, not the worst driver you saw last Tuesday. A street where most drivers do 28 mph and a handful do 50 will often fail, even though those 50 mph cars are the ones everyone remembers.

Steps to request a speed hump on your street

Here is the sequence I recommend, based on what worked:

1. Find your city's program. Search your city website for "traffic calming" or "neighborhood traffic." Download the eligibility criteria and the petition requirements before anything else.
2. Talk to neighbors first. Knock on doors along the affected block. Many programs require signatures from 51 to 75 percent of households on the street, and some count one signature per address. Find out early whether you can reach that number.
3. Keep a short log. Note times, rough speeds if you have a radar app, and any near misses for two to three weeks. It will not replace the official study, but it helps the city place counters at the right time and location.
4. Submit the application. Include the block limits, your log, and a short note on who uses the street: a school route, a park entrance, elderly residents.
5. Collect petition signatures when asked. Many cities send the petition only after the study shows the street qualifies. Go back to the neighbors you already spoke to.
6. Attend the meeting if there is one. Some programs hold a public hearing or a neighborhood meeting before installation. If you have never spoken at one, our guide to reading a zoning notice on your street covers how public notice periods typically work.

What it costs and who pays

A standard asphalt speed hump typically costs $2,000 to $6,000 to install, including signs and pavement markings. A longer speed table runs roughly $5,000 to $15,000. In most cities, the program budget covers it. Some cities ask residents to share the cost, or offer a faster track if the neighborhood pays in full. Ask about this early so it does not surprise anyone at the petition stage.

Humps, tables and cushions compared

You may be offered a different device than the one you asked for. Here is what the terms usually mean:

Speed bumps, the short sharp ones in parking lots, are a different thing entirely. Cities almost never install them on public streets because they are too abrupt at road speeds.

Why a single hump is often the wrong ask

The usual advice is to ask for one hump in the middle of the block where speeding is worst. I think that often backfires. Drivers slow for one hump and then speed up again within 100 to 150 feet. Engineers know this, which is why effective designs space humps about 250 to 600 feet apart in a series.

If your block is long, a request for a series, or for a hump paired with other measures, usually serves the street better. Those measures can include a raised crosswalk at a school entrance, curb extensions that narrow the road at the corner, or even street trees and planters that make the road feel tighter. Narrower-feeling streets lower speeds without a jolt. We have written about how small physical changes reshape how people use a space in turning a shared courtyard into something people use, and the same principle applies on a residential block.

It is also worth being honest about trade-offs. Humps add noise from braking and accelerating, and some neighbors closest to the hump will dislike it. Fire departments may object on key response routes, as humps can add a few seconds per device. Addressing these concerns upfront makes the petition easier.

If your street is turned down

A rejection is not always the end. Ask the city for the actual study numbers. If the 85th percentile speed was close to the threshold, you can often reapply after a set waiting period, commonly 12 to 24 months. Ask also about lighter options: speed feedback signs, extra speed limit signs, targeted enforcement, or painted lane narrowing. More community-led projects are featured in our community section.

Frequently asked questions

How long does it take to get a speed hump installed?

From application to installation, six months to two years is common. The traffic study and petition stage can take a few months, and then the street joins a ranked list waiting for funding. Construction itself usually takes a day or two.

How many signatures do I need for a speed hump petition?

It depends on your city, but 51 to 75 percent of households on the affected block is typical. Some programs count one signature per property and require property owners rather than renters. Check the exact rules before you start collecting.

Can a speed hump damage my car?

A properly built speed hump is designed to be crossed safely at about 15 to 20 mph without damage. Problems usually come from crossing too fast or from low-clearance vehicles. Speed tables are gentler if your street has many low cars or buses.