A road in Davis, California, with four lanes curb to curb
The same road repainted after a road diet, with two through lanes plus bike lanes and a central left-turn lane
A road diet (also called a lane reduction, road rechannelization or road conversion) is a technique in transportation planning whereby the number and/or the width of travel lanes of the road is reduced to achieve proven benefits, including a statistically attested crash reduction rate of 19% to 47%.[1]