does the tunnel have toll plazas?
It had but now open road tolling is implemented
Holland Tunnel
Tolls are collected at a tollbooth on the New Jersey side. Originally, tolls were collected in both directions. In August 1970, the toll was abolished for westbound drivers, and at the same time, eastbound drivers saw their tolls doubled. The tolls of eleven other New York–New Jersey and Hudson River crossings along a stretch, from the Outerbridge Crossing in the south to the Rip Van Winkle Bridge in the north, were also changed to south- or eastbound-only at that time. E-ZPass was first made available at the Holland Tunnel in October 1997.

Open road tolling will be implemented in late 2020.
what does the holland tunnel look like underwater UNANSWERABLE what is this tunnel? It is a vehicular tunnel under the Hudson River is this tunnel built to connect cities? Yes, Lower Manhattan with Jersey City does the river flow through these aforementioned cities? Yes are there any other tunnels build under this river? Yes, Lincoln Tunnel who are the operating authority for the tunnel mentioned at the beginning? Port Authority of New York and New Jersey (PANYNJ) when was the aforementioned authority established? 1921 does the tunnel (mentioned at the beginning) consists of tubes? Yes, a pair of tubes who is the chief engineer on the project? Clifford Milburn Holland how is the underwater tunnel ventilated? It contains a system of vents that run transverse, or perpendicular, to the tubes
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Holland Tunnel [SEP] Tolls
The tolls of eleven other New York–New Jersey and Hudson River crossings along a stretch, from the Outerbridge Crossing in the south to the Rip Van Winkle Bridge in the north, were also changed to south- or eastbound-only at that time. E-ZPass was first made available at the Holland Tunnel in October 1997. Open road tolling will be implemented in late 2020. The tollbooths will be dismantled, and drivers will no longer be able to pay cash at the tunnel. Instead, there will be cameras mounted onto new overhead gantries. A vehicle without E-ZPass will have a picture taken of its license plate and a bill for the toll will be mailed to its owner.