The phrase "a variable speed limit" is correct and usable in written English.
It can be used in contexts related to traffic regulations or road safety, particularly when discussing speed limits that can change based on conditions.
Example: "The highway implemented a variable speed limit to improve safety during peak traffic hours."
Alternatives: "dynamic speed limit" or "adjustable speed limit".
A variable speed limit was introduced, determined by sensors.
This study explores stakeholder perceptions in the implementation of a variable speed limit (VSL) system in St .Louis, Missouri.
This study also showed that in the initial stage, the combination of ACC and a variable speed limit achieved better safety improvements on congested freeways than each single technique.
This is how the M25 operates much of the time with traffic following a variable speed limit of, say, 60mph.
In this paper, we examined the impact that the process used to calibrate the crash prediction model has on estimates of safety impacts of a variable speed limit system.
In this paper we have examined the sensitivity of the estimated safety performance of a variable speed limit system to the method used to calibrate the log-linear crash prediction model.
These two crash prediction models are then used in combination with a simulation model to evaluate the safety impacts of a candidate variable speed limit system.
The two calibrated crash prediction models described in the previous section were used to estimate the safety impacts of a candidate variable speed limit control strategy.
This is not to investigate which model has a better fit, rather to evaluate sensitivity of model calibration on the final safety benefits of a candidate variable speed limit system.
The calibrated crash prediction models are used to evaluate the safety benefits of a candidate variable speed limit system under three different traffic demand levels (Peak, Near-Peak, and Off-Peak).
In this paper a mode dependent variable speed limit (VSL) control strategy is developed for motorway networks.
