The Transport Complaints Unit received 6,431 complaints and suggestions in the year's second quarter, up 18.6% on the previous quarter.
Most were related to public transport services (86%), followed by enforcement matters (10%) and traffic conditions (2%).
Cases on public transport services increased by 19% to 5,530, while those on traffic conditions increased from 139 to 141.
Road maintenance cases increased from 24 to 32, and complaints about illegal parking and other enforcement matters increased from 569 to 702.
Of the cases, 55 were pure suggestions.
The unit completed investigations into 5,639 cases during the period.
Departments and transport operators took on board 14 suggestions to enhance public transport services and improve traffic conditions.
