Brisbane buses will soon be twice as likely to be tailed by a security car as Brisbane City Council boosts its investment in bus driver safety.

The safety of the city's bus drivers has been topical following the death of council bus driver Manmeet Sharma in October 2016.

Brisbane buses drivers and passengers will have increased safety measures rolled out in August. Credit:Michelle Smith

The council conducted a $100,000 independent review into Mr Sharma's death, which prompted a safety overhaul across the fleet.

Since that report, released in April, council buses had undergone changes including increased signage about CCTV and emergency exits and the installation of additional emergency exits at the rear of some buses.