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
Finish all story missions
Collect the Farmlands Collectable
Collect the Forest Collectable
Buy 5 bikes
Collect the Ruscago Airfield Collectable
Collect the Port Hamc Collectable
Collect the Downtown Collectable
Collect the Chitaly Collectable
Collect the Subtroit Collectable
Buy 5 weapons
Buy 3 weapons
Buy 5 bike parts
Hit 1000 pedestrians
Complete upgrade a bike
Hit 500 pedestrians
Finish a sprint mission
Outsmarted the cops in escape
Finished a arcade mission
Buy a new bike
Win your first circuit race
Buy a weapon
Finish a stunt mission
Hit 50 pedestrians
Hit a pedestrian
Spend more than 10000
Spend more than 5000
Upgrade a bike
Spend more than 2000
Buy 3 bike parts
Spend your first money
Buy a bike part
Win your first eliminator race
Finished a time trail