When the groundbreaking scheme begins on Wednesday, all lorries will be checked by guards using a carbon dioxide gas detector which can trace human breath inside the vehicles.
(the groundbreaking scheme; begins; T:on Wednesday) (all lorries; will be checked; by guards; T:When the groundbreaking scheme begins on Wednesday) (a carbon dioxide gas detector; can trace; human breath; L:inside the vehicles)
the groundbreaking scheme all lorries a carbon dioxide gas detector
begins will be checked can trace
T:on Wednesday
by guards T:When the groundbreaking scheme begins on Wednesday
human breath L:inside the vehicles