The street in front of a building is as much a part of the project as the building itself. I’ve designed buildings that work perfectly — functional, well-organized, good relationship between interior and exterior — and then watched them struggle because the street they face is hostile to pedestrians. Wide traffic lanes, no shade, fast-moving cars, nowhere to pause — the building creates a front door that the street makes unusable. complete streets are the antidote to that problem, and understanding the concept has changed how I think about the relationship between architecture and the public realm.
Complete Streets: The Street Design Philosophy That Puts People Before Cars
complete streets is both a design philosophy and a policy movement. As a design philosophy, it holds that streets should be designed to serve all users — pedestrians, cyclists, transit riders, and motorists — rather than optimizing exclusively for vehicle throughput. As a policy movement, it has produced legislation, design standards, and municipal policies in hundreds of cities and jurisdictions that require new road projects and road reconstructions to accommodate multiple modes of travel rather than defaulting to the car-centric designs that dominated 20th century street engineering.
This article explains what complete streets are, what design elements make a street complete, where the concept came from and how it has evolved, examples of this approach that demonstrate what the concept looks like in practice, and what architects and urban designers need to understand about complete streets when designing buildings that face public streets.
What Are Complete Streets?
Complete streets are streets designed and operated to enable safe, comfortable travel for all users regardless of age, ability, or mode of transportation. A a good street accommodates pedestrians with continuous and accessible sidewalks, cyclists with protected or complete streets cycling infrastructure, transit riders with accessible stops and shelters, and motorists with lanes appropriate to the context — without any one group being systematically excluded or endangered by the design.
The good street design concept contrasts with conventional American street design, which emerged from traffic engineering practices developed in the mid-20th century that prioritized vehicle throughput above all other considerations. Conventional street engineering widened lanes, reduced friction for turning vehicles, minimized pedestrian infrastructure, and created streets that are efficient for driving but dangerous and unpleasant for everyone not in a car. good street design reverse those priorities — or more accurately, expand the list of users whose needs the street is designed to serve.
good street design does not mean that every street must have every element — protected bike lanes, wide sidewalks, bus stops, street trees, and vehicle lanes all simultaneously. It means that street design decisions should consider all potential users and modes, and that the needs of pedestrians, cyclists, and transit users should receive equal weight with the needs of motorists. On a quiet residential street, a complete streets approach might mean good sidewalks and calm vehicle speeds. On a major urban boulevard, it might mean protected cycling tracks, wide sidewalks with street trees, transit priority lanes, and pedestrian crossing phases that accommodate slower walkers.
| 💡 good street design is not about eliminating car travel — it’s about designing streets that work for everyone who uses them. Most streets today are designed almost exclusively for cars. good street design design acknowledges that pedestrians, cyclists, transit riders, children, elderly people, and people with disabilities all have legitimate claims on public street space and that streets should serve all of them well. |
The Core Elements of Complete Streets
Complete streets are defined by a set of design elements that collectively create street environments safe and comfortable for all users. Not every a good street includes every element — context determines which are most appropriate — but these are the building blocks of this approach design.
Protected Pedestrian Infrastructure
The foundation of complete streets is adequate sidewalk infrastructure. good street design require continuous sidewalks — not sidewalks that end at property lines and force pedestrians into the road, or sidewalks blocked by utility poles, parked cars, or poorly designed curb cuts. good street design sidewalks are wide enough for comfortable two-directional pedestrian flow, accessible to wheelchair users and people with strollers, shaded by street trees or building awnings, and separated from vehicle traffic by a buffer — parked cars, planting strips, or bollards — that provides physical protection from vehicles.
Pedestrian crossings are the most dangerous moments for pedestrians on any street, and good street design treat crossing design with proportional care. good street design crossings are raised above the roadway to slow vehicles and provide level access, signalized with pedestrian phases long enough for slower walkers and people with mobility impairments, and located at logical desire lines rather than requiring pedestrians to detour to formal crossings that aren’t where they want to cross.
Cycling Infrastructure
Complete streets provide infrastructure for cyclists that is appropriate to the street’s vehicle speeds and volumes. On low-speed, low-volume local streets, shared lanes with traffic calming may be sufficient for comfortable cycling. On higher-speed arterial streets, good street design typically require complete streets cycling infrastructure — either protected bike lanes separated from vehicle traffic by a physical barrier, or separate cycle tracks.
The type of cycling infrastructure matters: painted bike lanes on high-speed arterials without physical separation are not complete streets cycling infrastructure — they provide the appearance of accommodation without the safety that encourages people to choose cycling.
The quality of cycling infrastructure on complete streets is measured by its usability by a broad range of cyclists — not just confident athletic cyclists willing to share lanes with fast traffic, but children, older adults, and less experienced cyclists who will only ride if the infrastructure feels genuinely safe. complete streets cycling infrastructure designed only for the most confident cyclists is not serving the full range of users that complete streets is meant to serve.
Transit Accommodation
Complete streets accommodate transit riders by providing accessible, comfortable stops with shelters and real-time information, ensuring buses can move efficiently through traffic, and making it safe and easy for transit users to reach stops on foot. On major transit corridors, streets may include dedicated bus lanes that allow buses to travel at consistent speeds regardless of traffic conditions — a feature that dramatically improves transit reliability and reduces operating costs.
The interface between street design and building design is particularly important for transit stops. A bus stop on a this corridor that is located immediately in front of a building with a blank wall, no weather protection, and no place to sit is a failure of both street design and building design. Architects designing buildings on transit corridors should treat the transit stop as part of the building’s public interface — providing shelter, seating, and active frontage that makes waiting comfortable.
Traffic Calming and Appropriate Vehicle Speeds
Complete streets use traffic calming measures to bring vehicle speeds into alignment with the needs of pedestrians and cyclists — recognizing that the probability of pedestrian fatality in a collision increases dramatically with vehicle speed. At 20 mph (32 km/h), pedestrian fatality risk is approximately 10 percent. At 40 mph (64 km/h), it exceeds 80 percent. complete streets use raised crossings, narrowed travel lanes, chicanes, roundabouts, and other physical measures to reduce speeds to levels appropriate to the street’s context rather than relying solely on speed limit signage that drivers routinely ignore.
Traffic calming on it has consistently been shown to improve safety for all road users — including motorists — without significantly reducing vehicle throughput when implemented at the network scale. The fear that complete streets will cause intolerable traffic congestion is one of the most common objections to implementation and one of the least well-supported by evidence.
Street Trees and Green Infrastructure
Street trees are a this element that serves multiple functions simultaneously: shading pedestrians and cyclists, reducing the urban heat island effect, managing stormwater, providing habitat, improving air quality, and creating the physical quality that makes walking on a a good street an experience worth having rather than a functional necessity. complete streets treat street trees not as optional amenities but as essential infrastructure — as important to the street’s function as pavement or lighting.
| complete streets Element | Primary Users Served | Design Standard | Common Failure |
| Continuous sidewalks | Pedestrians, wheelchair users, strollers | Min 1.8m clear, continuous, accessible | Gaps, obstructions, too narrow |
| Protected bike lanes | Cyclists of all skill levels | Physical separation on streets > 40 km/h | Paint-only lanes on high-speed roads |
| Bus stops with shelters | Transit riders | Accessible, weather protection, seating | No shelter, no seating, no real-time info |
| Traffic calming | All users — especially pedestrians | Physical measures, not just signage | Speed limits without physical enforcement |
| Raised crossings | Pedestrians, especially elderly and disabled | Level with sidewalk, signalized appropriately | Crossings too far apart or not at desire lines |
| Street trees | All users — shade, comfort, air quality | Every 6-10m on pedestrian routes | Removed for utility or parking |
Where Complete Streets Came From
The the complete streets movement emerged in the United States in the early 2000s as a response to the dominance of traffic engineering in street design. The term was popularized by Barbara McCann and Suzanne Rynne in a 2004 article, and the National complete streets Coalition was established in 2005 to advocate for good street design policy adoption at state and local levels across the US.
The underlying ideas behind they have older roots. European cities — particularly in the Netherlands, Denmark, and Germany — had been designing streets to serve cyclists and pedestrians effectively since the 1970s, when Dutch cities responded to oil crisis-related traffic restrictions by investing in cycling infrastructure that proved popular enough to become permanent. The Netherlands’ extensive cycling network, which has made cycling the dominant mode of transport in many Dutch cities, represents these principles applied at the national scale over fifty years.
In the United States, complete streets policy adoption has been rapid: by 2020, over 1,500 jurisdictions — cities, counties, and states — had adopted complete streets policies of varying strength. The quality and implementation of those policies varies enormously — a complete streets policy that requires consideration of all modes during road design is very different from one that actually produces streets with protected cycling infrastructure, wide sidewalks, and transit priority. The policy is necessary but not sufficient; implementation is where the street is actually built.
Complete Streets Examples That Demonstrate the Concept
New York City — Times Square and Broadway
New York City’s pedestrianization of Broadway through Times Square in 2009 is one of the most dramatic these interventions in North American history. Converting seven blocks of Broadway from vehicle lanes to pedestrian plazas reduced vehicle-pedestrian conflicts, improved pedestrian and cyclist safety on the remaining street network, and increased retail sales in surrounding businesses by 50 percent. The Times Square this transformation demonstrated that reallocating street space from vehicles to people produces measurable economic benefits — not the economic damage that business owners typically predict when parking and vehicle lanes are removed.
New York’s broader complete streets effort, which included protected bike lanes on major avenues including Ninth Avenue, First and Second Avenues, and the Prospect Park West in Brooklyn, produced consistent results: cycling volumes increased substantially, cyclist injury rates fell dramatically, and pedestrian safety improved. The evidence from New York City’s this program is among the strongest available demonstrating that street design improves safety for all road users.
Bogotá — Ciclovía and Urban Transformation
Bogotá’s Ciclovía program — which closes 120 km of major streets to cars every Sunday from 7 a.m. to 2 p.m., opening them to cyclists, pedestrians, and skaters — is not technically a this intervention since it’s temporary rather than permanent. But it demonstrates the principle that streets can serve different users than cars, and it has been directly influential on this thinking in Latin American cities. Bogotá’s permanent cycling infrastructure — the Cicloruta network of dedicated bike paths — has also grown substantially since the 1990s, reflecting a sustained commitment to these principles in a city that has invested seriously in non-car mobility.
Oslo — Toward Zero Traffic Deaths
Oslo, Norway achieved zero pedestrian and cycling fatalities in 2019 — a complete streets outcome produced by sustained investment in protected cycling infrastructure, pedestrian zones, reduced speed limits, and traffic calming throughout the city. Oslo’s approach combines street design with Vision Zero — the road safety philosophy that accepts no traffic deaths as inevitable. The combination of this infrastructure that physically separates vulnerable users from vehicles and Vision Zero policy that sets zero fatalities as the goal has produced the safest urban road environment in the world.
Complete Streets and Architecture: The Connection Every Architect Should Make
For architects, complete streets is not just an urban planning topic — it’s a design constraint and a design opportunity that affects every building that faces a public street. The relationship between a building and its street is one of the most important design decisions in architecture, and street design directly shapes the conditions within which that relationship operates.
Buildings on these streets should be designed to engage with the pedestrian environment rather than to retreat from it. Active ground floors — commercial uses, lobbies with visual transparency, community spaces that open to the street — contribute to the pedestrian vitality that street design is trying to create. Buildings that set back behind parking lots, present blank walls to the sidewalk, or locate entrances away from the street undermine this investment by creating dead frontage that makes walking feel unpleasant and unsafe.
Architects designing buildings on these corridors should also think carefully about cyclist access. Secure, weather-protected bicycle parking at building entrances — not in a basement accessible only by a steep ramp — signals that the building welcomes cyclists and reduces the car parking demand that street design is trying to reduce. These are small decisions that collectively determine whether the investments cities make in well-designed streets produce the walkable, cyclable neighborhoods that the concept promises.
Frequently Asked Questions About Complete Streets
Do complete streets hurt local businesses by removing parking?
The evidence consistently shows they do not — and often the opposite. Multiple studies of this approach implementations that removed on-street parking to create cycling infrastructure or wider sidewalks found that retail sales increased after the conversion.
The reason is that pedestrians and cyclists make more frequent visits to local businesses than motorists, even though they spend less per individual trip. A a street that brings more people past a business on foot generates more total business than a street that brings fewer people past faster in cars. The New York City Times Square pedestrianization, San Francisco’s Valencia Street bike lanes, and multiple European examples all showed sales increases following well-designed streets interventions.
Are complete streets only for dense urban areas?
No — though streets look different in different contexts. In dense urban areas, well-designed streets typically include separated bike lanes, wide sidewalks with trees, and transit priority. In suburban contexts, well-designed streets might focus on sidewalk continuity (many suburban streets have no sidewalks at all), crosswalks at logical locations, and traffic calming that reduces speeds to pedestrian-safe levels.
In small towns and rural communities, well-designed streets might mean ensuring that streets through the downtown core accommodate pedestrians safely rather than prioritizing vehicle throughput through the center of town. The specific elements vary; the principle — that streets should serve all users — applies everywhere.
How do cities fund complete streets improvements?
Complete streets improvements are funded through the same mechanisms as conventional road projects — primarily through transportation capital budgets at the municipal and state level, federal transportation grants, and in some cases through development impact fees or value capture from the increased property values that well-designed streets generate.
In the United States, federal transportation funding through programs like the Transportation Alternatives Program and BUILD grants supports well-designed streets projects. The cost of these improvements when roads are being reconstructed anyway is typically modest — the additional cost of adding bike lanes, wider sidewalks, and crosswalk improvements to a road reconstruction project is far less than retrofitting them separately later.
Complete Streets Are Not a Niche Design Preference — They’re the Standard Every Street Should Meet
The streets we have in most cities were not designed to serve everyone who uses them — they were designed to move vehicles as fast as possible, and everyone else was an afterthought. well-designed streets is the recognition that this was a mistake with serious consequences: pedestrian deaths, cycling danger, transit inefficiency, and urban environments so hostile to anyone without a car that walking becomes a last resort rather than a first choice.
well-designed streets are not radical. They are what streets looked like before the automobile dominated street design, and what streets look like in the cities that have consistently prioritized pedestrian and cycling safety over vehicle throughput. The Netherlands, Denmark, Japan, and other countries where streets genuinely serve all users didn’t achieve that by accident — they made sustained policy and design commitments to these principles over decades, and their cities are more livable, safer, and more economically productive as a result.
For architects, the movement is a reminder that buildings do not exist in isolation. The street is an extension of the building’s public interface, and a street designed for everyone creates a better context for architecture than one designed only for cars. Engaging with well-designed streets design — treating the sidewalk, the cycling infrastructure, the tree planting as part of the project rather than someone else’s responsibility — is part of what it means to design buildings that contribute to the city rather than just occupying a site within it.
These articles from the Urban Planning cluster expand on these streets themes:
→ The urban heat island that well-designed streets trees address: Urban Heat Island Effect: Why Cities Are Getting Hotter and What We Can Build to Change That — Street trees and permeable surfaces are core these elements that simultaneously address the urban heat island effect. This article covers urban heat island mitigation in depth.
→ The transit that well-designed streets support: Transit Oriented Development: The Planning Strategy That Gets People Out of Cars — well-designed streets and transit oriented development are complementary strategies — well-designed streets make walking to transit stations comfortable and safe, which increases ridership and makes TOD work.
→ The sprawl that well-designed streets counter: Urban Sprawl: Causes, Effects, and Why It’s One of the Hardest Problems to Reverse — Urban sprawl produces streets that are structurally incompatible with well-designed streets principles. Understanding sprawl helps explain why retrofitting in suburban environments is so difficult — and what land use changes would make it more achievable.
Explore our Complete Guide here: Urban Planning
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