NORMAN — City officials said what they learned from a massive ice storm in December 2007 may have helped them better weather the storm that moved through Norman this week. "We’ve had less power outages, and they’re of shorter duration. I think that’s a result of what we learned in 2007. We learned the importance of tree-trimming,” said police officer Jennifer Newell. The city and the electric companies have worked to keep trees trimmed near power lines and in the public rights of way, Newell said. Almost 2,000 residents had experienced power outages by Friday afternoon, but most of them were of short duration, Newell said. Electric companies were to continue working to prevent outages today. A portion of W Robinson Street between 24th Avenue NW and Berry Road was closed Friday because of a water line break about 6 a.m. The roadway was flooded, "turning it into a skating rink,” Newell said. City crews hoped to have the water line repaired by late afternoon, but that portion of Robinson was to remain closed because of hazardous conditions, she said. Utilities Director Ken Komiske said the break in the 16-inch transmission line was identified and isolated so no water customers were affected. Sanitation trucks made their usual rounds Friday, except for an area east of 48th Avenue NE, Komiske said. One sanitation truck was involved in a traffic accident, but no injuries were reported, city officials said. Newell said police adopted a "slick-roads” policy Thursday afternoon, which remained in effect Friday. According to the policy, officers were not responding to noninjury accidents. Motorists were urged to exchange information. City officials made arrangements for an emergency shelter to open at Northhaven Church, 4600 36th Ave. NW, if needed. However, Newell said, no one had sought shelter as of midafternoon Friday. "I think as long as power outages are of short duration, people are safer staying at home,” she said.