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Western Cape transport MEC, Robin Carlisle says he is against a proposed national measure to impose a zero limit on drinking and driving.
Carlisle reportedly wrote to National Transport Minister, Ben Martins to inform him of his concern.
He argued that the country did not have a structure in place to manage and enforce such a law, because of the turnaround time for blood tests and the lack of breathalysing at national road blocks.
Carlisle reportedly proposed that more effort be put into improving the turnaround time for blood results at state laboratories and into behaviour-changing campaigns.
The national transport ministry recently put forward a case for lowering the legal blood-alcohol level to zero in a presentation to the inter-ministerial committee on substance abuse.
The committee, headed by Social Development Minister, Bathabile Dlamini, reportedly agreed with and accepted the department's proposal.