Yes. $30 seems like a lot to me for this and it's kind of shocking, but we're not talking about price gouging for food, water, or some basic necessity. We're raising the price of toll lanes specifically built as express lanes and funded through these tolls. They just get people home faster than the regular lanes.
Additionally, I suspect that in these conditions if they charged the regular prices, so many people would take the express lanes that they would slow to a crawl like the rest of the road, frustrating their purpose.