The **maximum permitted blood alcohol concentration** for bicycle riders is **0.25 milligrams per liter of exhaled air**. This limit applies to any vehicle and driver not in special categories, such as novice drivers or those transporting heavy goods, passengers, minors, or hazardous materials, who have a lower permitted limit of 0.15 milligrams per liter of exhaled air.

Cyclists, like other drivers, must undergo alcohol tests if requested by an officer. These tests are conducted by blowing into a device that measures the amount of alcohol in the exhaled air. It is important to remember that, although the permitted limit is 0.25 milligrams, the only completely safe level for driving is **0.0**, meaning no alcohol consumption.