But he said the weekend should not be considered in isolation to indicate road safety efforts were failing.
"We wouldn't look at this weekend on its own and say something's not working - if we're looking for trends we can say we've had a continual improvement in the road toll for the last 10 years."
Although the seven holiday deaths have pushed the toll since January 1 to 125, up five on the same time 12 months ago, Mr Morgan said "ups and downs" were to be expected during a year.
Before Easter, which was the first public holiday since records began in 1956 to enjoy a zero toll, there had been nine road deaths over a 24-hour period.
"So we have those statistical blips or whatever you want to call them - I hesitate to do that, we're talking about people's lives, but just looking at figures alone, you have to look at them over the long term."
He said the weekend's toll had to be put in perspective, given that more than half the deaths were in one crash.
He was referring to the deaths on Saturday night of four farmhands in a vehicle which went out of control, ending up in a paddock, at Putorino, about 60km north of Napier.
Mr Morgan said alcohol was a suspected factor in three of the weekend's four fatal crashes, the exception being at Otane in Hawkes Bay soon after dark on Saturday, when a pedestrian was struck and killed by a car.
She was Gail Annette Hansen, 67, of Hastings.
A 19-year-old man also died after being hit by a car in Christchurch and a man died and three people were hurt when a car hit a power pole south of Stratford in Taranaki on Saturday.