The cost of road plate rentals varies due to brand, model, usage, and rental company, ranging from a few dozen to several hundred dollars per day.

For instance:

Shandong-based company offers 12-meter road formwork for rent at 300 yuan per day.
Another company's 12-meter flat vibratory roller rental rate is 60 yuan per hour.
A Shenzhen-based company is renting a 15-meter flat plate subgrade compactor for 800 yuan per day.

Additionally, other relevant information includes that the leasing company also offers 13-meter flatbed trucks for rent, with daily rates ranging from 360 to 450 yuan.

In summary, the specific price for road base plate rental depends on selecting the appropriate leasing company and equipment, which requires detailed communication to determine.