Every property manager has watched it happen: a driver treats the main drive aisle like a shortcut, blows past the storefront at 30 mph, and misses a pedestrian by a few feet. In a parking lot, cars and people share the same pavement with no sidewalks and no traffic signals — which is exactly why traffic calming exists. Done right, it slows vehicles to walking-safe speeds without wrecking drainage, snagging delivery trucks, or blocking fire access. Done wrong, it creates ponding water, cracked pavement, and tenant complaints.
Biran Paving Group is a licensed and insured asphalt contractor based in Dunwoody, serving commercial and residential properties across Metro Atlanta. Over 15+ years and 500+ projects, we've installed traffic calming as part of full parking lot paving jobs and as standalone add-ons — and we've removed plenty that were installed badly. Here's what we'd tell you before you order a single bump.
Speed Bumps, Speed Humps, and Speed Tables Are Not the Same Thing
The names get used interchangeably, but the geometry — and the effect on drivers — is very different:
- Speed bumps are short and abrupt: roughly 2–6 inches tall and only 1–3 feet across in the direction of travel. They force vehicles down to about 2–10 mph. Best for tight spaces where you want a near-stop: parking garage ramps, drive aisles in front of building entrances, gated apartment entries.
- Speed humps are longer and gentler: 3–4 inches tall stretched over 12–14 feet. Cars can roll over them comfortably at 15–20 mph. Best for internal roads, private HOA streets, and long multifamily drive lanes where you want traffic slowed but flowing.
- Speed tables are flat-topped humps, often around 22 feet long, and frequently double as raised crosswalks. Ideal for retail centers and school or daycare pick-up loops where pedestrians cross a busy drive aisle.
Picking the wrong one is the most common mistake we see. A true speed bump on an HOA street will have residents scraping bumpers and filing complaints within a week; a gentle hump in front of a grocery entrance won't slow anyone enough to matter.
Asphalt vs. Bolt-Down Rubber
Asphalt speed bumps and humps are formed from hot-mix asphalt, shaped and compacted directly onto your pavement. They're permanent, they flex and expand with the lot around them, and there are no anchor bolts to work loose. They perform best when installed during paving, resurfacing, or a mill-and-pave overlay, because the crew and materials are already on site.
Rubber and plastic modular units bolt to the surface. They're cheaper per unit, fast to install, and removable — genuinely useful for testing a location before committing. The downsides show up over time: anchor bolts loosen under traffic, edges curl, and in a Georgia summer, the units and the asphalt around the anchors both take a beating. Every bolt hole is also a small hole in your pavement that lets water into the base.
Our honest take: use rubber to trial a placement, use asphalt for anything you intend to keep.
Where to Put Them — and Where Not To
Placement matters more than the product. Put devices where speed actually builds:
- Long, straight drive aisles (the classic cut-through route)
- Approaches to pedestrian crossings, storefront entrances, and dumpster/loading zones
- Blind corners and areas where kids are present in multifamily communities
And keep them out of:
- Drainage flow paths. A bump placed across the lot's natural water route creates ponding, and standing water is how asphalt dies. Any good installer will read the slope before painting a layout.
- Fire lanes — unless the local fire marshal has signed off. Fire apparatus access is regulated, and an unapproved bump in a marked fire lane can come up at inspection.
- ADA accessible routes. Accessible paths from parking to entrances have slope requirements a bump can violate.
- The first 20–30 feet off a public street, where a stopping car can stack traffic back into the roadway.
Signage and Striping Are Half the System
An unmarked speed bump is a trip hazard and a claim waiting to happen. Every device should get high-visibility yellow markings (chevrons or zebra stripes) and advance warning signage. And before you buy bumps at all, remember that paint is the cheapest traffic calming there is: stop bars, directional arrows, marked crosswalks, and clear one-way flow through our line striping and pavement marking service solve a surprising share of speeding problems on their own — often the smarter first step.
What Traffic Calming Costs
Honest industry ranges, not quotes: bolt-down rubber units typically run a few hundred dollars to around $1,500 installed depending on width and anchoring. A formed asphalt speed bump or hump usually lands in the $1,000–$2,500 range as a standalone job, because mobilizing a crew and hot mix for a small pour carries fixed costs. Speed tables and raised crosswalks run higher. The economics improve dramatically when calming is added during sealcoating, resurfacing, or repaving — the equipment is already there, so you're mostly paying for material and labor time.
The Rules in Metro Atlanta
On private property — retail lots, apartment communities, office parks, HOA-owned streets — the decision is yours as the owner or association. Public residential streets are different: counties like Fulton, DeKalb, Cobb, and Gwinnett run formal traffic-calming programs with petition and study requirements, so if the street is county-maintained, start there, not with a contractor. For private fire lanes, loop in the fire marshal before installing anything in or across them.
Keep Them Maintained
Traffic calming only works while drivers can see it. Plan to refresh yellow markings every couple of years (sooner on high-traffic lots), patch any cracking at the device edges early, and fold it all into a scheduled asphalt maintenance program so it never falls off the radar.
Thinking about slowing traffic in your lot or community? Biran Paving Group carries a 5.0-star rating, provides a certificate of insurance on request, and — with the added crews from Michael's Asphalt operating alongside us — can usually fit smaller calming projects in quickly. Call (678) 332-8941 or email biranpaving@gmail.com for a straight answer on what your lot actually needs.