BROOKLYN - (AP) - New York's Transportation Department says it's addressing some safety concerns on a stretch of Bronx highway where an accident killed seven people. Commissioner Joan McDonald says new concrete barriers will be installed on the outside travel lane on three viaducts that elevate the Bronx River Parkway. One of those viaducts is 60 feet over the Bronx Zoo, where an SUV landed on Sunday, killing seven members of a Bronx family. Police said the SUV hit a median, then crossed three lanes and hit a 2-foot-high concrete curb. The SUV then flew over a 4-foot guardrail and plummeted to the zoo below, killing all passengers on impact. McDonald says crews started working Wednesday morning on signs and striping on the highway.