Guangdong toll-road operator Hopewell Highway Infrastructure recorded double-digit growth in traffic and toll revenue last month, despite mainland policy aimed at cooling economic growth and perhaps aided by another putting overloaded trucks off the road. Hopewell Highway said average daily traffic of its Guangzhou-Shenzhen superhighway jumped 17 per cent year on year to 201,000 vehicles last month and its average daily revenue grew 22 per cent to 7.22 million yuan. The company's ring-road network in Guangzhou - the Guangzhou East-South-West Ring Road - fared even better with average daily traffic up 43 per cent to 58,000 vehicles and average daily toll revenue 45 per cent higher at 892,000 yuan. Traffic on the first phase of its Western Delta route, from Guangzhou to Shunde, had built up steadily since its opening in April. Its average daily traffic stood at 13,000 cars last month, up 30 per cent from May, while its average daily toll revenue totalled 186,000 yuan, up 26.53 per cent from a month earlier. ABN Amro Asia analyst Maurien Yau said existing traffic levels looked sustainable in the second half of this year, especially as the crackdown on overloaded trucks had been concentrated in Shaanxi, Henan and Hubei. From June 20, the mainland imposed heavy penalties on overloaded trucks in an effort to improve road safety. The move, which involved the installation of about 3,000 checkpoints and about 810,000 inspectors around the country, slowed traffic volume by 12 per cent in the 19 days to last Friday, according to the Ministry of Communications. 'Ultimately, of course, we believe the campaign against overloading will increase traffic, as more trucks will eventually be needed to carry the cargoes,' Ms Yau said. Hopewell Highway is the latest toll-road operator to report strong traffic and toll-revenue growth on the mainland. Last month, dominant toll-road firm Shenzhen Expressway recorded an annualised 45.7 per cent rise in average daily traffic and 37.7 per cent in average monthly toll revenue. Zhejiang Expressway, which operates Shanghai-Hangzhou-Ningbo Expressway, followed with its average daily traffic jumping 28 per cent and its monthly average monthly toll revenue rising 31.5 per cent.