---
title: "Protected bike lane retrofit via lane removal"
url: "https://commonwaysystem.org/retrofits/corridor/protected-bike-lane-lane-removal/"
id: "RFT-CDR-08"
description: "Installs a physically separated bike lane by removing an entire travel lane, the same underlying mechanism as a road diet, applied specifically to create bike facility space."
updated: "2026-10-18"
---

RFT-CDR-08

# Protected bike lane retrofit via lane removal

Installs a physically separated bike lane by removing an entire travel lane, the same underlying mechanism as a road diet, applied specifically to create bike facility space.

## Strategy viewer

Illustration in progress

No illustration of Protected bike lane retrofit via lane removal has been made yet. Interactive views are planned for every pattern and Retrofit Strategy.

## Overview

Where narrowing lanes alone doesn't recover enough width for a genuine protected facility, removing a full travel lane does. This is effectively a road diet whose primary purpose, rather than a secondary benefit, is the bike lane it creates. AASHTO recommends this approach specifically where a corridor's traffic volume can absorb the reduced through capacity.

## Related Media

The items below come from outside the Commonway System, external videos, podcasts, and articles related to this page's topic, not part of the guidebook itself.

3 items

-   Aligned
    
    ### [Are Streets Too Complicated Now?](https://www.youtube.com/watch?v=u1Xs5EA5_uU)
    
    City Beautiful
    
    Asks whether today's proliferation of lines, signals, and lane types on streets is overcomplication or a needed response to modern demands, a question that runs directly through CS's Element-scale catalog and the density-tiered Corridor retrofit paths this video is tagged to.
    
    MED-004
    
-   Aligned
    
    ### [Dutch-style intersection design: bike-friendly](https://www.youtube.com/watch?v=yCzi1Q4xCTA)
    
    BicycleDutch
    
    Shows the protected-intersection design vocabulary, continuous cycle tracks, corner refuge islands, separated signal phasing, that underpins CS's Protected Intersection pattern and the Corridor retrofit paths built around it.
    
    MED-005
    
-   Aligned
    
    ### [America's deadliest road, explained](https://www.youtube.com/watch?v=0-nthHT-J1k)
    
    Vox
    
    Vox examines a one-kilometer stretch of US-19 in Florida, the deadliest of 60 pedestrian-fatality hotspots in a national study, and shows how eight lanes, 45 mph speeds and crossings nearly a kilometer apart make deaths predictable rather than accidental. It is a vivid case study of the Stroad problem and of the crosswalk, signal, driveway and lane-removal fixes the Commonway System specifies.
    
    MED-107
    

[See all 3 in the Media Gallery](https://commonwaysystem.org/media/?for=RFT-CDR-08)

## Where this leads: Target patterns

-   [Bike Highway / Greenway](https://commonwaysystem.org/patterns/collectors/bike-highway-greenway.md) (COL-BHG-04)
-   [Default (No Parking, No Direct Access)](https://commonwaysystem.org/patterns/arterials/default.md) (ART-DEF-01) with [Protected Bike Lane / Cycle Track](https://commonwaysystem.org/patterns/elements/protected-bike-lane-cycle-track.md) (ELM-PBL-37)

## Applicability and thresholds

Follows the same volume thresholds as a standard road diet, since removing a lane carries the same through-capacity implications regardless of what the recovered space becomes. Most viable below roughly 19,000 to 25,000 vehicles per day.

## Evidence and effectiveness

FHWA reports crash reductions of up to 29 percent on road diet conversions generally; where the recovered lane specifically becomes a protected bike lane, the same crash-reduction mechanism applies alongside the added bicycling safety benefit of physical separation from traffic.[1][2]

## Getting it built

Can move through the construction spectrum the same way a standard road diet does, restriping first, with a protected lane's physical separation elements (curbs, planters, or flexible posts) added at the quick-build stage before permanent construction. See [Construction Methodology & The Build Spectrum](https://commonwaysystem.org/guide/construction-methodology-spectrum.md).

## Who can move this

Usually a city or county transportation department decision, following the same approval path as a standard road diet. See [Legal & Planning Mechanisms](https://commonwaysystem.org/guide/legal-planning-mechanisms.md).

## Related retrofit strategies

-   [Protected bike lane retrofit via lane-width reallocation](https://commonwaysystem.org/retrofits/corridor/protected-bike-lane-width-reallocation.md) (RFT-CDR-07)
-   [Protected bike lane retrofit via parking reduction](https://commonwaysystem.org/retrofits/corridor/protected-bike-lane-parking-reduction.md) (RFT-CDR-09) (the other two approaches to the same underlying goal, distinguished by where the recovered width comes from)

## References

1.  Evidence-based [Transportation Policy Research, Texas A&M Transportation Institute, "Bicycle Lanes." AASHTO-recommended retrofit approaches without widening the road.](https://policy.tti.tamu.edu/strategy/bicycle-lanes)
2.  Legal / regulatory [Federal Highway Administration, "Road Diets (Roadway Reconfiguration)," Proven Safety Countermeasures, FHWA-SA-12-013.](https://highways.dot.gov/safety/proven-safety-countermeasures/road-diets-roadway-reconfiguration)