SINGAPORE (Reuters) - Sweden's Volvo Buses and Singapore's Nanyang Technological University (NTU) on Tuesday unveiled a full-size autonomous electric bus for testing this year in the city state. High-density Singapore has been encouraging the development of driverless technology in hopes that its residents will use more shared vehicles and public transport. Tests with one bus on the university campus could begin in a few weeks to months, before moving to public roads after regulatory approvals, NTU President Subra Suresh told reporters. He hoped the tests could be extended to public roads in a year. A second bus will undergo tests at a city bus depot.