Winter road safety on the M-30 highways

Published 21/12/2018
winter road safety on the m30

You must be aware of winter road safety on the m30 when there is risk of snow and ice. The Winter Emergency Plan from Madrid City Council aims to maintain the greatest level of road safety possible and to achieve the least number of incidences as possible. If there are incidents, the user will be informed, and they will be given possible alternatives at all times.

During the winter of 2017-2018, 18 interventions were made, in which 704.30 tonnes of fluxes were used and 163,192 litres of brine.

Machinery used for winter road safety works on the highways

Five snow ploughs were used during the winter of 2017-2018. Each truck has a front blade for a clearance width of 3.5 metres, a salt spreader with a capacity of 6m3 and brine tanks of 1,500 litres.

A brine manufacturing plant was also extremely useful to prevent patches of ice from forming on the highways. The plant is capable of producing 2,500 litres an hour and has a storage capacity of 20,000 litres.

In addition, six salt spreaders and a van with a 1,000-litre brine spreading tank were used.

Fluxes used for winter road safety works on the highways

The flux used is mainly Sodium Chloride (NaCl) in a solid state. The strength or amount of flux used is modified depending on the weather conditions and the state of the road.

They are stored in several collection points, with two new salt storage silos whose capacity is 100 tonnes each. The total availability of fluxes for this 2018-2019 winter is approximately 600 tonnes.

Phases of the Winter Road Safety Plan on the M-30 highways

The start of the Plan will be introduced when the forecasted accumulated thickness of snow is more than 3 centimetres in 24 hours. For lower thicknesses, there will be specific treatments on certain points and key roads, according to the forecasted temperatures.

The different phases of the Winter Road Safety Plan will be activated according to the states of alert described below:


State 0: There is no forecasting of snow or patches of ice. But the fluxes are collected, and the machinery checked.

State 1: In this case there is a likelihood of there being snowfall or that patches of ice are formed. Therefore, the fluxes and the machinery are prepared to act in 1 hour at most.

State 2: There is both a forecasting of snow and ice. Therefore, cleaning services using water are cancelled and the risk networks are cut.


State 3: There is both snowfall and patches of ice forming. In this case, the cleaning services using water remain cancelled and the risk networks are cut. Also, the salt fluxes are distributed.


State 4: Once the snowy conditions or the formation of patches of ice are over, treatments are carried out to encourage the snow and patches of ice to disappear. The drainage system grates are cleared and cleaned, risk networks are opened and cleaning services using water are started.

So, if there is a chance of snow or frost and you need to take the car, we advise you to check the state of the roads before leaving home. You can do this on the Directorate General of Traffic website.


The last
Effects of the time change on drivers Published 17 de October de 2019

Do you know the influence of time change on drivers? Since every year in October, a change of time takes effect. Next Sunday, 27 October, when it is 3 o’clock in the morning, clocks will be turned back so that it is really 2 o’clock. This is how we will pass from summer time to […]

M-30 tunnels: How can we inspect the longest urban tunnels in Europe? Published 14 de October de 2019

The structural inspection in the M-30 tunnels  has posed a challenge since the beginning. The current Spanish legislation has not made any reference to these inspections. For this reason, a specific procedure had to be developed in order to carry them out. Since construction ended on it in 2007, the M-30’s tunnels have posed a significant […]

Simulation 2019

Published 01 de March de 2019