In his letter (GPS can do what new-generation ERP can, Sept 12), Mr Sunil Kumar Ragnath suggested that the Land Transport Authority (LTA) void the nexgen ERP tender and adopt a system that uses GPS technology, and that this would save money.

The nexgen ERP tender has to proceed because the current ERP system which is more than two decades old is nearing the end of its operational lifespan.

The new system in fact uses GPS technology. However, for security reasons, charging cannot be done through a handphone, but will be through a new On-board Unit (OBU).

The ERP system contains travel data of one million motorists and this needs to be protected. It is better not to allow communications linkages between the system and personal handphones.

Charging through an OBU, which is an integral part of the ERP system, will better ensure data integrity.

Mr Peter Loon Seng Chee (On-board unit for ERP needs better design, Sept 16) questioned the need for a separate OBU display, when there are already in-vehicle displays and smartphone displays.

The LTA will need to study this suggestion, taking in consideration data integrity and user experience.

We will be moving into our next round of consultations with industry soon, including workshops, and will also explore ways to install the OBU display unit in a less obtrusive way.

Lam Wee Shann 
Chief Innovation and Transport Technology Officer 
Land Transport Authority