LAS VEGAS (AP) — A costumed leprechaun will be frolicking across Las Vegas streets to test whether drivers yield to pedestrians.UNLV Safe Community Partnership chief Erin Breen says police will hand out tickets Tuesday to motorists who fail to stop for green-clad pedestrians crossing streets.Fines can cost $190 and up.Pedestrians can also be ticketed for trying their luck crossing streets outside a crosswalk.Breen says pedestrian deaths in Clark County are up 50 percent so far this year.The St. Patrick's Day enforcement comes after a costumed turkey tested drivers in November, and Santa trolled crosswalks around Christmas.