Napier-Taupō Rd speed review: SH5 and 51 consultation period extended 7 May, 2021 04:06 AM 3 minutes to read The consultation period for the State Highway 5 and SH51 speed review has been extended by four weeks. Photo / Warren Buckland The consultation period for the State Highway 5 and SH51 speed review has been extended by four weeks. Photo / Warren Buckland Hawkes Bay Today Waka Kotahi NZ Transport Agency has extended its consultation period for the State Highway 5 and SH51 speed review by four weeks. It's also apologised for its calculation that suggested the average travel time on Napier-Taupō Rd would go up by less than a minute.