From Gliwice, in Poland, one may easily hitch the following directions:
West:
By A4 motorway to:
1. Opole/Wrocław/Legnica/Germany direction: Berlin & Gorlitz
East:
By A4 motorway to:
2. Katowice/Kraków/Tarnów/Rzeszów/Przemyśl/Ukraine direction Lviv
By National Road No.44 to:
3. Mikołów/Tychy
South:
By National Road No.78 to:
4. Rybnik /Czech Republic direction Ostrava
North:
By National Road No. 901 to:
5. Olesno (juntion with NR no.11 to Poznań)
By National Road No. 78 to:
6. Tanowskie Góry (juntion with NR No.11 to Poznań)
I'll add practical details & tips asap