Central Business District (CBD)

Time-speed data points

The Central Business District (CBD) Cycle is a chassis dynamometer testing procedure for heavy-duty vehicles (SAE J1376). The CBD cycle represents a “sawtooth” driving pattern, which includes 14 repetitions of a basic cycle composed of idle, acceleration, cruise, and deceleration modes. The following are characteristic parameters of the cycle:

• Duration: 560 s
• Average speed: 20.23 km/h
• Maximum speed: 32.18 km/h (20 mph)
• Driving distance: 3.22 km
• Average acceleration: 0.89 m/s²
• Maximum acceleration: 1.79 m/s²

Vehicle speed over the duration of the CBD cycle is shown in Figure 1.