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Table 2 Summary of variables of interest

From: Radio communication-based method for analysis of train driving in an ERTMS signaling environment

Variable

Explanation

Message/packet

V_MAXTRAIN

Maximum train speed (km/h)

Validated train data/validated train data

V_TRAIN

T_TRAIN

Train speed (steps of 5 km/h)

Trainborne clock (s)

Train position Report/position report

NID_LRBG

Identity of last relevant balise group (no)

Movement authority/no packet (included in message head)

NID_BG

D_LINK

Balise identity

Distance to next balise group in train route (m)

Movement authority/linking

D_LRBG

D_STATIC

V_STATIC

Distance between the train and the last balise group (m)

Distance to next speed change (m)

Allowed speed (km/h)

Movement authority/international static speed profile