Temporary speed restrictions and single lane stop-go systems have been put in place at two bridges in the region while repairs are carried out.
The work will create some delays for motorists although both works are scheduled to be wrapped up by the end of Tuesday.
Repairs have been under way on the Mohaka Bridge on SH5 between Napier and Taupo and on the Mangatewai Stream Bridge on SH50.
Impact on travel times were expected to be up to five minutes.
Temporary speed restrictions are also in place at the third bridge repair programme being carried out, at the Karamu Stream on SH2 near Hastings, although a New Zealand Transport Agency spokesman said delays would be negligible.