LTA recorded a total of 550 bookings last month alone.
This was revealed by authority spokesman Iliesa Sokia, who said the figures represented 295 drivers issued with traffic infringement notices for violating the authority's mobile communication regulation.
Mr Sokia said another 255 drivers were issued defect orders for non-compliance.
"The authority is being vigilant in trying to control the use of mobile phones whilst operating a moving vehicle," he said.
"It's an issue the authority had campaigned against following a nationwide awareness and outreach program launched early this year under the Triple E concept of Road Safety or "Just Drive, No Mobile Phone While Driving" road campaign. The campaign ran for two months and was intended to create awareness and educate drivers to refrain from using mobile phones while driving."
Mr Sokia said despite the authority's efforts to remind motorists, there were drivers who still violated the regulation.
"Forty per cent of drivers violating mobile communication rules represent PSV drivers and it's a concern to LTA," he said.
"The authority will take stringent and drastic measures against PSV drivers who violate mobile communication laws.
"While they have been issued notices, the authority's PSV unit has also begun identifying drivers who have recorded more than 20 traffic infringement notices to proceed with disciplinary processes."