---
title: "Retrofit Strategy Index"
url: "https://commonwaysystem.org/retrofits/"
description: "Every Retrofit Strategy currently in the Commonway System, grouped by scale, Network, Corridor, and Intersection."
---

# Retrofit Strategy Index

Every Retrofit Strategy currently in the Commonway System, grouped by scale: Network, Corridor, and Intersection. See [How to read a retrofit strategy](https://commonwaysystem.org/guide/how-to-read-a-retrofit-strategy.md) for what each part of a Retrofit Strategy entry covers and how it relates to the Pattern catalog.

A Pattern describes what a street should be. A Retrofit Strategy describes how to move an existing street toward one. This index lists the strategies; [Patterns](https://commonwaysystem.org/patterns.md) has the destinations.

## Network level strategies

Network strategies change how an area functions as a whole, typically by restricting motor vehicle through-traffic without changing any single street's underlying topology classification.

1

### [Modal filtering / Low Traffic Neighborhood retrofit](https://commonwaysystem.org/retrofits/network/modal-filtering-low-traffic-neighborhood-retrofit.md)

`RFT-NET-01`

2

### [Superblock retrofit](https://commonwaysystem.org/retrofits/network/superblock-retrofit.md)

`RFT-NET-02`

3

### [Barrier-crossing / network reconnection retrofit](https://commonwaysystem.org/retrofits/network/barrier-crossing-network-reconnection-retrofit.md)

`RFT-NET-03`

## Corridor level strategies

Corridor strategies change a single street segment's cross-section: lane count, lane width, curb use, or surface. Most can move through the construction spectrum starting from paint and temporary materials.

1

### [Four-to-three lane road diet](https://commonwaysystem.org/retrofits/corridor/four-to-three-lane-road-diet.md)

`RFT-CDR-01`

2

### [Five-plus lane reallocation](https://commonwaysystem.org/retrofits/corridor/five-plus-lane-reallocation.md)

`RFT-CDR-02`

3

### [Lane diet](https://commonwaysystem.org/retrofits/corridor/lane-diet.md)

`RFT-CDR-03`

4

### [One-way to two-way conversion](https://commonwaysystem.org/retrofits/corridor/one-way-to-two-way-conversion.md)

`RFT-CDR-04`

5

### [Parking-lane reallocation](https://commonwaysystem.org/retrofits/corridor/parking-lane-reallocation.md)

`RFT-CDR-05`

6

### [Transit priority lane retrofit](https://commonwaysystem.org/retrofits/corridor/transit-priority-lane-retrofit.md)

`RFT-CDR-06`

7

### [Protected bike lane retrofit via lane-width reallocation](https://commonwaysystem.org/retrofits/corridor/protected-bike-lane-width-reallocation.md)

`RFT-CDR-07`

8

### [Protected bike lane retrofit via lane removal](https://commonwaysystem.org/retrofits/corridor/protected-bike-lane-lane-removal.md)

`RFT-CDR-08`

9

### [Protected bike lane retrofit via parking reduction](https://commonwaysystem.org/retrofits/corridor/protected-bike-lane-parking-reduction.md)

`RFT-CDR-09`

10

### [Depaving / pavement-to-gravel conversion](https://commonwaysystem.org/retrofits/corridor/depaving-pavement-to-gravel.md)

`RFT-CDR-10`

11

### [2+1 road with cable median barrier](https://commonwaysystem.org/retrofits/corridor/two-plus-one-road-cable-barrier.md)

`RFT-CDR-11`

## Intersection level strategies

Intersection strategies change how a single intersection controls conflicting movements. Several of these require real construction from the outset and can't be meaningfully piloted with temporary materials.

1

### [Signal-to-roundabout conversion](https://commonwaysystem.org/retrofits/intersection/signal-to-roundabout-conversion.md)

`RFT-INT-01`

2

### [Median U-Turn (MUT) retrofit](https://commonwaysystem.org/retrofits/intersection/median-u-turn-mut-retrofit.md)

`RFT-INT-02`

3

### [Restricted Crossing U-Turn (RCUT) retrofit](https://commonwaysystem.org/retrofits/intersection/restricted-crossing-u-turn-rcut-retrofit.md)

`RFT-INT-03`

4

### [Displaced Left-Turn (DLT) retrofit](https://commonwaysystem.org/retrofits/intersection/displaced-left-turn-dlt-retrofit.md)

`RFT-INT-04`