Impact
The ERP system, although understandably unpopular among most road users, has helped to tweak road usage patterns since its implementation. The LTA reported that road traffic decreased by nearly 25,000 vehicles during peak hours, with average road speeds increasing by about 20%. Within the restricted zone itself, traffic has gone down by about 13% during ERP operational hours, with vehicle numbers dropping from 270,000 to 235,000. It has been observed that car-pooling has increased, while the hours of peak vehicular traffic has also gradually eased and spread into off-peak hours, suggesting a more productive use of road space. In addition, it has been noted that average road speeds for expressways and major roads remained the same, despite rising traffic volumes over the years.
The system has its share of problems. Road users pointed out that the implementation of an ERP gantry along any road simply moves the traffic somewhere else, potentially causing traffic bottlenecks along smaller roads. For example, the ERP gantry along the Central Expressway (CTE) has been said to have caused traffic to increase substantially in north-south trunk roads, such as along the Thomson Road and Serangoon Road corridors. The rising traffic prompted the LTA to add a gantry along Thomson Road, while Upper Serangoon Road's capacity was increased somewhat with the building of a new viaduct. Similarly, the ERP gantry on the East Coast Parkway's west-bound carriageway was said to have led to increased traffic on Geylang Road and Nicoll Highway, where ERP gantries were also placed subsequently. This "chasing after the jam" phenomena has led the general public to question its effectiveness.
While ERP gantries on major roads and expressways have usually been implemented on the carriageway which is city-bound, major traffic congestion on the north-bound carriageway of the CTE has led to the LTA considering its implementation there, a suggestion which has been met with protests by motorists who questioned the need to pay for the time they take to go home. The LTA, sensing the displeasure, attempted to alleviate the situation by widening the road between the Pan Island Expressway (PIE) and Braddell Road in 2003, in response to public feedback which frequently attributed the jams to this congested stretch. In addition, the LTA expressed hopes that the North East MRT Line would help provide an alternative form of transport for north-eastern residents, who usually use the CTE to reach the city. The pending completion of the Kallang-Paya Lebar Expressway in 2008 has also been cited as a solution to the almost nightly jams. There were also suggestions for the CTE to be further widened, including the construction of a viaduct, which the LTA rejected citing its infeasibility. When the jams continued to persist, the LTA finally made an announcement on 30 May 2005 that a new ERP gantry would be set up on the northbound stretch between the PIE and Braddell Road from 1 August 2005.
Read more about this topic: Electronic Road Pricing
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