Finding yourself stuck frequently in Oklahoma City traffic on the Interstate might be costing you 50 hours and $800 a year, according to a new transportation report. TRIP, a Washington-based transportation research group, estimated that congestion in Oklahoma’s metropolitan areas costs state residents a total of $1.5 billion a year because of lost time and fuel. Drivers in the Oklahoma City area lose an average of $842 and 50 hours a year from interstate traffic congestion, the report says.