. traffic, training and treats

tyson hates traffic we live next to a large park, so hes never really been around alot of main roads etc, but changed my route for his walks recently to try get him used to it, anytime were walking along beside a road his tail curls right under and he looks very nervous and anytime a bus or lorry ( really noisey) he trys to shoot of opposite direction. Iam really trying to master getting him to walk beside me off the lead and its hard because he wont accept any treats, he would refuse a steak if put infront of him. hes never ate anything when hes outside alot of people say this a good thing and i agree but when it comes to rewarding him i feel the good boy and a scratch behind the ear isnt enough. any advice?

How old is he? It's best to expose them to as many situations as possible at an early age so they can become used to as many things as possible.

hes 2yrs 4 months.... he's very easily scared an has been since he was a pup i lifted his chain one day and the noise of that sent him cowering in the corner i 1st thought the people we got him from were hitting him but he was only about 10 weeks old so surely not. another time he was cowering from a feather that was stck on the ground but blowing in the wind lol also when i go to put his harness and collar on he cowers down and shakes like mad but i think its more excitment than fear?? i'll try get a video of that later whem were goin out its really weird lol