A Restore Passenger Rail spokesperson says it's a bit extreme for a judge to decline bail for a protester.

Rosemary Penwarden appeared in Wellington District Court yesterday - accused of endangering transport on State Highway One in Kilbirnie.

She's been remanded in custody, but is appealing to the High Court to instead be given electronically monitored bail.

Protest group spokesperson James Cockle says it's a big call.

"As far as I know, it's the first time in our history that a climate protestor has been remanded in custody for protesting."

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