THE number of deaths on West Yorkshire's roads has almost halved over the last six months.
But delighted road safety officials don't know why - and could not believe at first what the statistics were telling them.
The number of deaths in the six months up to the end of June was 34 compared with 63 for the previous year.
In Kirklees the figure remained the same at six, but in Calderdale it fell from six to just one.
The total number of crashes across the county was 3,462, more than 400 fewer than the total for the same six months last year.
Serious accidents were also down by 41 to 505 and crashes where people were slightly hurt fell from 5,203 to 4,607.
Total casualties in Kirklees rose from 925 to 953 due to an increase in the number of pedestrians hurt on the area's roads.
Steve Thornton, chairman of West Yorkshire Road Safety Strategy Group, said: "The figures show a truly remarkable drop in the number of road casualties which, if the trend continues to the year end, could push road fatalities below the 100 level.
"This is a figure that's not been seen since just after the war."
He added: "There is no one single initiative or even series of initiatives that can be held responsible for this situation."
He said motorists must be taking more notice of traffic calming measures such as speed cameras, humps and extra warning signs.
He added: "The big difference is being made by the people of West Yorkshire who are responding to the work of the road safety teams in the local authorities.
"We all share a responsibility for casualty reduction - officials and members of the public alike - so let's all continue to work together to keep deaths and casualties off the streets."