C-Tran fares will increase for the seventh consecutive year on Monday.The cost of a single adult C-Zone fare, covering trips within Clark County, will jump from $1.70 to $1.75. C-Van, the agency’s reservation-based service for disabled riders, will also cost $1.75 per ride. A monthly C-Zone pass will cost $61, up from $60.Single-ride fares for C-Tran’s Express service to Portland will increase from $3.60 to $3.75. A monthly Express pass will cost $122.A single All-Zone fare, covering regular trips to Portland, will remain unchanged at $2.50. Discounted fares for youths and seniors will also stay the same.The C-Tran board of directors approved the fare increases in May to take effect Sept. 1.