R and N Maintenance workers score 55th Avenue asphalt so the remainder of their crew can seal cracks Thursday. They’ll be working throughout the city until next Tuesday between 7 a.m. and 10 p.m. except for high traffic intersections and roads which will be done between 7 p.m. and 6 a.m. or on Sunday. No parking signs will be set out at least 12 hours before work begins and vehicles left before signs are removed will be ticketed and towed. Alternating single traffic lanes and reduced speeds will also be in effect.