There will be increased traffic and pedestrian activity on Tuesday around the area of Addington Raceway, Lincoln Rd, Whiteleigh Ave and Barrington St for the start of Christchurch Casino NZ Trotting Cup Day.
Weather will be fine in time for the first race set to begin at 12.05pm. A high of 15 deg C is expected.
North-easterlies will develop in the afternoon.
A Christchurch Transport Operations Centre spokeswoman said it is expecting race day revellers will begin to move onto other locations from about mid-afternoon on Tuesday.
Road users are being warned to take extra care when driving through the area and those that use Whiteleigh Ave or Lincoln Rd should consider an alternative route.
The central city is also likely to be busy after the last race at 6.35pm.
A high level of cloud is forecast over the city on Wednesday for the beginning of the three-day New Zealand Agricultural Show. The MetService has forecast a high of 19 deg C.
Showers are expected on Thursday morning but the weather should clear up in the afternoon with a north-easterly wind.
The same is expected for Friday but there may be some showers in the morning before it clears.
Race-goers can dress for fine weather for the popular Riccarton Races with weather to reach a high of 20 deg C.
