I believe it's a mistranslation. Luohu has no road. There's the main footbridge for travelers, and the railway bridge + (restricted access) footbridge.
They were probably trying to express something along the lines of "non-aviation, non-maritime, road-like".
But I wonder how some of these can be used by someone on a TWOV, as they wouldn't have a ticket to HK.
In places like Huanggang, SZBay, Shatoujiao, you can cross the border on a cross-border bus, indeed carrying a ticket with a seat number. These buses usually come from somewhere in Guangdong, and you can buy a ticket either at their point of origin, or at the border crossing, for the Shenzhen-HK segment. There are also some ticketing offices in HK.
But unless you have a friend who can buy it for you ahead of time, and send it to you, good luck.
The other solution is to buy a cross-border train ticket, crossing in Futian (I believe there aren't any passenger Kowloon - Guangzhou trains anymore) but you need to present your passport at the ticket counter, in person (tickets are nominative). So not ideal, to say the least...
Actually, the list above seems to be old, as it doesn't list the Futian HSR station, separate from the Futian (pedestrian) port.