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Meet Sarah, an operator at the Highways Agency (HA) Regional Control Centre in Surrey.
When someone contacts the HA, either through emergency phones on the motorway or via the emergency services, Sarah is one of the people who handles the call.
On her monitors she is able to pinpoint the exact location of a distress call.
Sarah says: "If there was a lone female feeling vulnerable, we could radio through to the mobile unit giving the location so they could be with her. We are monitoring the units all the time. They are in radio contact for their safety too."