the entire trolleybus fleet with single-deck diesel-powered buses in the 1960s, led to the withdrawal of the only double-deck buses in early Penangite public transport. Following increasing public bus ridership, more open roadways and the feasibility of operating double-deck Hop-On Hop-Off tourist buses within Kuala Lumpur, Prasarana Malaysia purchased 40 (revised from an earlier 111) Alexander Dennis Enviro500 double-decker buses in 2014 to serve high volume Rapid KL Rapid Bus routes; with a capacity of 108 passengers each, it is double that of a contemporary single-deck bus in the fleet. The first five buses of the batch entered service in September 2015; with the rest of the fleet gradually added into service in the following months. In November 2019, Prasarana ordered a further 90 Gemilang Coachworks-bodied Volvo B8Ls as part of Rapid KL's bus fleet replacement programme, with the first batch of buses entering service in June 2020. Feasibility studies were also conducted by Prasarana in 2015 on the reintroduction of double-deckers in Penang through Rapid Penang's bus service. By August 2016, a fleet of three Rapid Penang Enviro500s were officially launched into service, with a total of 33 buses planned. Although plans were reaffirmed in 2017 to expand the double-decker fleet by 30, the existing three Enviro500s were quietly withdrawn from service by 2018 due to operational issues and were subsequently transferred to the Rapid KL fleet. Beyond mass transit, double-deckers have seen widespread use as long-distance coaches since the late-2000s in response to growing demand for intercity travel, as expressways and outlying bus stops lack physical obstacles that plagued urban bus services. Singapore In October 1953, a single AEC Regent III double-decker from the fleet of the Kuala Lumpur-based General Transport Company was sent to Singapore for demonstration. It was used on service by the Singapore Traction Company for two weeks. After that, it was inspected by two Chinese-owned bus companies, and then sent back to Kuala Lumpur. However, no orders for double-deckers immediately followed. Although Sentosa was already operating several ex-London double decker buses such as the AEC Regent III RT and the Leyland Titan RTL from 1975 to the early 1980s, double-decker buses only made a major comeback in Singapore's public bus system on 13 June 1977 when Singapore Bus Service (SBS, present-day SBS Transit), introduced 20 Leyland Atlantean AN68 buses on route 86 which was launched by then-Deputy Prime Minister and Minister of Communications Ong