A crash at a farmers' market that killed 10 people and injured 63 sends an urgent warning to state and local traffic planners to ensure that safety barricades, detour signs, and barriers are adequate at locations where streets are temporarily closed, according to federal safety officials.

“It is imperative that cities understand the hazards associated with road closures and apply countermeasures that will prevent the intrusion of vehicles into pedestrian areas,” said National Transportation Safety Board chairman Ellen Engleman Conners.

The Safety Board recently concluded its investigation into a July 2003 crash involving an 86-year-old driver whose vehicle hit another car at an intersection in Santa Monica, Calif., then drove into a temporarily closed street where a farmers' market was being held, striking pedestrians and vendor displays.

The Safety Board said the driver failed to maintain vehicle control; the board also expressed concern about an inadequate barrier system to protect pedestrians at the market, poor temporary traffic planning, and inadequate road-closure signage.

The full report is available on the NTSB's Web site at www.ntsb.gov.