On certain Egnatia Motorway sections modern weather stations operate and collect weather data (wind, air temperature, frost, etc). Operating weather stations fall under three categories:

	stations measuring Wind Data (anemometres)
	stations measuring Ambient Temperature
	Road Weather Information Systems stations (RWIS)

Anemometres

Road Weather Information Systems, RWIS

The road sections where weather stations operate are indicated on this map.

In particular:

WIND DATA MEASUREMENT STATIONS

On certain Egnatia Motorway sections, mainly during winter, severe weather phenomena and strong winds often cause either the accumulation of large volumes of snow at specific locations on the road (in case of snowfall) or run-off road incidents that mainly involve high vehicles.

In order to evaluate the problems and find possible solutions, anemometric data were collected on wind direction and speed at specific locations.

These  anemometric stations had wind speed and direction sensors based on ultrasounds technology, connected to a data logger. They store the average, minimum, maximum and standard deviation of values every 10’. Communication with the data collection system is performed telemetrically through a GSM modem.

AMBIENT TEMPERATURE MEASUREMENT STATIONS

At the East Region of the Egnatia Motorway, from Ag.Syllas IC through Kipi, ambient temperature measurement sensors were installed. Data are collected automatically through wireless communication technologies (GSM, VHF), and they are accessible by maintenance crews through Web, WAP and SMS services. The information provided helps in optimising winter maintenance works (salt spreading, timely notification of snow ploughs, etc.).

The locations of ambient temperature sensors are the following:

	Kavala By-pass (Ravine Bridge 2)		Kavala By-pass
	Vaniano		Vafeika
	Kopteros		Iasmos
	Kompsatos		West Komotini
	East Komotini		Lissos Bridge
	Mesti		Makri
	Alexandroupoli		Eirini
	Alexandroupoli Industrial Zone (BI.PE.)		Link Road
	Tsai Rema		Manthia Bridge
	Ardanio		Kipi

ROAD WEATHER INFORMATION STATIONS

Weather data collection/ recording systems and systems that forecast local road weather phenomena, such as frost, fog, wind etc contribute greatly to the prompt provision of information to users, as well as to the effectiveness of winter maintenance works.

On the Egnatia Motorway, Road Weather Information Systems, RWIS) operate on various road sections. In particular:

	5 RWIS on Polimilos – Veria section (Kastania Bypass: Α2/1413/01 Ch.6+386, Ch. 16+850, Ch. 21+593 and Α2/1314/01 Ch. 2+995, Ch. 6+100), and
	5 RWIS on Igoumenitsa – Ioannina section (Vassilikos tunnel, Ag.Nikolaos – Tyria tunnel, Dodoni tunnel).

More weather stations are to be installed on Egnatia Motorway sections that are under construction, and specifically on sections with tunnels.

Weather data transfer and processing is performed telemetrically at the respective tunnel Traffic Control Centres on the above road sections.