Introducing electric cars to Hong Kong will require more than just change in infrastructure - the new technology will also mean drivers must change how they think about getting around, an expert says. Chan Ching-chuen, an electrical engineer at the University of Hong Kong, said the mindset of drivers was as important to making the cars a success as ensuring there was a wide choice of vehicles available. 'It is a chicken-and-egg question but both have to be answered at the same time,' said Dr Chan, who is on the government's steering committee on electric vehicle development. The government on Friday signed a memorandum of understanding with Japanese car maker Nissan on introducing such vehicles in the city. It was the second such deal Hong Kong had entered into in two months. Earlier, Mitsubishi Motors promised to bring its newest electric car, iMiEv, for road tests. The car is expected to arrive next month. Dr Chan said the city could become one of the world's success stories in adapting to electric vehicles - the city's compact size gave it a big advantage. But using the cars was more than a matter of technology. It was also a social question, and the key to success lay in overcoming drivers' 'psychological barriers', which policy would have to address. 'When it comes to electric cars, Hong Kong is a different story from other cities as nearly half of the journeys people make in cars is less than 50km. If you look at this data, you will be very optimistic. But the psychology of drivers is another matter.' Dr Chan said it was important that early adopters, expected to be the wealthy, found the cars convenient. Driving them had to be fun or the technology would not take off. The government could consider offering incentives such as cash subsidies or tax concessions and free parking to help develop the market. It was essential the government fostered alliances among carmakers, power companies and property developers, he said. In the early stages of the roll-out, the recharging network should cover public car parks and property developments, he said. Lawmakers could also require developers make rechargers a standard feature in new buildings. It would be worth considering offering drivers free recharging, he said. Quick-charging points or battery-swapping spots should be set up at convenient locations or near border crossings. Dr Chan predicted that electric vehicles would not become the dominant method of road transport in Hong Kong as they would remain costly for some time. He said it was more likely that hybrid cars - powered by electricity and petrol, would prevail at least until 2020.