These systems are becoming more popular globally and in the region; similar congestion pricing systems are being planned or considered in other large Emerging Asian cities, including Beijing and Jakarta. While the number of vehicles entering the city each day in Singapore increased by 22.1%, from 246 000 to 300 400, between 2004 and 2014, average speeds on expressways and arterial roads remained mostly unchanged and within their target ranges (Table 2.8). However, the design and pricing of these systems can create unintended consequences.