Cities across the nation, including Barrie, are on track to see a secondary decline in gas prices in just one week. On Tuesday, Canadian for Affordable Energy predicted an eight cent decrease by the following day. That meant the average regular gas price in Barrie went from 175.9 to 167.9 on Wednesday. That same day, the price of diesel went down by 10 cents, from 210.9 to 199.9. Now, the advocacy agency says gas prices will drop again by Friday. After a short-term regional increase in gas prices on Thursday, another eight cent dip is expected for regular gas and a drop of 15 cents is expected for diesel. According to Canadians for Affordable Energy, by Friday, the price of regular is estimated to be 160.9, 192.9 for premium and 234.9 for diesel.