Here is the full list of all 34 Road Rage trophies - there are 22 bronze, 5 silver, 6 gold and 1 platinum.
Earned all trophies
Complete upgrade a bike
Hit 1000 pedestrians
Hit 500 pedestrians
Collect the Farmlands Collectable
Collect the Forest Collectable
Collect the Ruscago Airfield Collectable
Collect the Port Hamc Collectable
Collect the Downtown Collectable
Collect the Chitaly Collectable
Collect the Subtroit Collectable
Buy 5 bike parts
Buy 3 bike parts
Buy 5 weapons
Buy 3 weapons
Finish all story missions
Buy 5 bikes
Finished a arcade mission
Hit 50 pedestrians
Finish a sprint mission
Hit a pedestrian
Outsmarted the cops in escape
Buy a weapon
Buy a new bike
Spend more than 10000
Spend more than 5000
Upgrade a bike
Spend more than 2000
Spend your first money
Buy a bike part
Win your first circuit race
Finish a stunt mission
Win your first eliminator race
Finished a time trail