| 1995 | 1998 | 1999 | 2000 | 2001 | 2002 | |
| Operational length of a network - axis | 0 | 0 | 0 | 774,2 | 819,0 | 822,7 |
| of which: | ||||||
| trolleybus route | * | * | * | 386,1 | 404,5 | 408,7 |
| tramway route | * | * | * | 338,3 | 364,7 | 364,2 |
| metro | * | * | * | 49,8 | 49,8 | 49,8 |
| Source: SDP, MD's transport statistics | ||||||
3.2.2. Urban public transport electric traction infrastructure (Km)
| 1995 | 1998 | 1999 | 2000 | 2001 | 2002 | |
| Operational length of a network - axis | 0 | 0 | 0 | 774,2 | 819,0 | 822,7 |
| of which: | ||||||
| trolleybus route | * | * | * | 386,1 | 404,5 | 408,7 |
| tramway route | * | * | * | 338,3 | 364,7 | 364,2 |
| metro | * | * | * | 49,8 | 49,8 | 49,8 |
| Source: SDP, MD's transport statistics | ||||||