As alredy mentioned, You have to buy the tolling unit and pre-paid the credit first. Then with every tolling gate missing the amount will be deducted from Your unit.

But beware! Youre unit must always be turn on and with sufficient credits, otherwise You can be inficted by the expensive fines or even Your vehicle can be pawned, when Youre riding without sufficient credit in Your device!

You can determine needed amount exactly here. It depends on the current date, number of axles, and emission class of Your vehicle.

When a car less then 3,5tons is pulling a single trailer, there is no need to use the unit, even when both devices are more then 3,5 tons in weight together. Only the sticker ( see ) is needed

the map with toll duties can be found here

There are toll duties for all type of vehicles on these highways and speedways:

Route Nr.             From-To                                                                                Length (km)

D1                   Praha, Spořilov – Říkovice (exity 1-272)                                              272,4

D1                   Lipník nad Bečvou – státní hranice (exit 298 až km 377)                      79,5

D2                   Brno, jih – státní hranice (exit 1 až km 61)                                            61,0

D3                   Mezno – Čekanice (exity 62-76)                                                             14,2

D5                   Praha, Třebonice – státní hranice (exit 1 až km 151)                   150,9

D8                   Praha, Březiněves – státní hranice (km -3,5 až km 92)                  95,6

D11                 Praha, Horní Počernice – Sedlice (exity 1-84)                              84,7

R1                   Praha, Satalice – Praha, Běchovice                                                           3,3

R1                   Modletice (D1/R1) – Praha, Ruzyně-staré letiště (exity 76-28)            35,4

R4                   Jíloviště – Skalka (exity 8/9-41)                                                               31,6

R4                   Radobytce – Nová Hospoda (exity 77-84)                                                 6,8

R6                   Praha, Řepy – Nové Strašecí (exity 1-32)                                                31,7

R6                   Jenišov – Cheb, sever (exity 131-169)                                         38,0

R7                   Praha, Ruzyně-letiště – Knovíz (exity 2-18)                                             16,6

R7                   Bítozeves – Žiželice (exity 60-66)                                                              5,3

R10                 Praha, Satalice – Ohrazenice (exity 1-71)                                                71,3

R35                 Liberec, Hodkovická – Ohrazenice (exity 26-44)                                     17,5

R35                 Sedlice – Opatovice (exity 126–129)                                                         4,1

R35                 Mohelnice, jih – Křelov (exity 235-261)                                                   25,8

R35                 Olomouc, Topolany – Lipník nad Bečvou (km 264 až exit 296)               33,0

R46                 Vyškov, východ – Olomouc, Slavonín (exit 1 až km 39)                           39,2

R48                 Bělotín – Bělotín, východ (exity 1-3)                                              3,5

R48                 Frýdek-Místek – Žukov (km 47 až exit 70)                                             19,4

R52                 Rajhrad – Pohořelice, jih (exity 10-26)                                                     16,9

R55                 Hulín – Otrokovice (exity 16-32)                                                             16,4

R56                 Ostrava, Hrabová – Frýdek-Místek (exity 39-51)                                 12,2

R63                 Bystřany – Řehlovice (exity 1-7)                                                                7,0

see the blue marked tracks within the map for more details.

Only the vehicles hevier then 3.5 tons have to pay at these regular roads:

Route Nr.             From-To                                                                                Length (km)

I/7                   Panenský Týnec – Smolnice (exity 37-41)                                                   2,5

I/11                 Hradec Králové, Kukleny – Hradec Králové, Plotiště nad Labem                3,4

I/11                 Český Těšín, Svibice – Mosty u Jablunkova, státní hranice                       16,6

I/30                 Lhotka nad Labem – Ústí nad Labem, Vaňov                                             14,4

I/33                 Plotiště nad Labem – Náchod, Branka                                              23,5

I/35                 Křelov – Olomouc, Řepčín (okružní křižovatka)                                          2,4

I/35                 Horní Chrastava – Liberec, Hodkovická (exit 26)                                       12,8

I/38                 Jihlava, Bedřichov – Jihlava, západ                                                              3,6

I/46                 Olomouc, Slavonín – Olomouc, centrum                                                     1,1

I/47                 Kroměříž, východ – Hulín                                                                            3,6

I/47                 Přerov – Bělotín                                                                                          22,4

I/48                 Bělotín, východ – Frýdek-Místek                                                                 40,0

I/52                 Modřice, sever – Rajhrad                                                                             4,3

I/52                 Pohořelice, jih – Mikulov, státní hranice                                                      20,7

I/55                 Přerov, Horní Moštěnice – Hulín (I/47)                                                         11,4

I/58                 Skotnice – Krmelín                                                                                     13,2

see the red marked tracks within the map for more details.