High temp in traffic is most likely caused by a weak fan. Check your fans for unusual noises or alog. With the fans on feel the strength of the air coming out. Kung medyo mahina time to replace the motor na. Try to observe the temp din with the AC off in similar conditions. Kung bumaba most likely fan nga ang problem. Silipin mo na rin ang outside fins ng rad baka barado na. Number one kalaban dito balahibo ng aso o pusa

Coolant leaks could be another cause. Nasilip mo ba ang radiator and reservoir kung may laman pa after that incident?