A Queens mom walking her daughter to preschool was killed yesterday when she was blindsided by a dump truck barreling through a dangerous Brooklyn intersection.Fanisha Sotamba was crossing Broadway when she looked back at her husband — who had stopped to strap their 3-year-old daughter, Charlize, into a stroller — and was mowed down by a southbound truck that had just made a right turn off Myrtle Ave. in Bushwick, police said. A relative said it happened so fast that Sotamba's husband, Charles, didn't initially grasp his wife's fate."He crossed the street wondering, 'Where is she? Where did she go?' and then saw a body lying in the street," said Jose Guillen, 43, who is married to the husband's cousin."First, he thought it was a homeless man, but then he recognized his wife's clothes. He rushed his daughter back to the sidewalk...screaming for help."The driver, Wilfred King, told police he never saw Sotamba but stopped after he felt a "bump." When he climbed down from his rig, the 24-year-old mom was lying lifeless, her skull crushed by a back wheel. He was not issued a ticket.Sotamba's best friend, Melissa Arroyo, 29, of Brooklyn, said the doomed woman moved here from Baltimore two years ago and was constantly telling her to be careful when crossing Broadway. "I was always the one running past the cars and she would say, 'You better watch out,' " said Arroyo. "I would say, 'No, this is New York.' "Sotamba was the first person killed at the intersection in recent history, according to the city's Department of Transportation. But 45 pedestrians have been struck by vehicles at the intersection since 1996, Transportation Alternatives, a watchdog group, reported. The intersection sits in the shadow of the elevated J, M and Z tracks.Locals said the area gets a lot of truck traffic and ambulances speeding to nearby Woodhull Hospital. Adding to the chaos, several side streets feed more traffic into the intersection. "It's chaos," said Dennis Borges, 41, who lives nearby. "The thing is everyone wants to get ahead so they try to beat the light."The tragedy unfolded shortly before 7:30 a.m. as Sotamba was heading to the Child Prodigy Learning Center on Broadway, where Charlize has been a student for six months, police said. Guillen said Sotamba, who worked for the City University of New York and took college courses online, may have been distracted. "The couple hadn't slept well last night because the girl was sick," he said.Learning center owner Cheryl Bacchus said Sotamba was a devoted mother. "She was very concerned about her daughter," Bacchus said.Last night, Charlize was nestled in her aunt Maria Guillen's arms. She said the little girl would stay, for now, with her in the Bronx.She said the child's 28-year-old dad was too devastated to talk. "He's upset and crying," the aunt said.