TVSI = (Tf x Sf) + (Tp x Sp)
Where:
TVSI = Train Volume and Speed Index
Tf = Average number of freight trains/day
Tp = Average number of passenger trains/day
Sf = Maximum timetable speed for freight trains
Sp = Maximum timetable speed for passenger trains
Category | Characteristics | Closure Criteria |
1: | Incorporated/Signalized* | ADT [LESS THAN OR EQUAL TO]125 and TVSI [GREATER THAN OR EQUAL TO] 240 |
2: | Incorporated/Unsignalized | ADT [LESS THAN OR EQUAL TO]175 and TVSI [GREATER THAN OR EQUAL TO] 240 |
3: | Unincorporated/Signalized* | ADT [LESS THAN OR EQUAL TO]75 and TVSI [GREATER THAN OR EQUAL TO] 300 |
4: | Unincorporated/Unsignalized | ADT [LESS THAN OR EQUAL TO]100 and TVSI [GREATER THAN OR EQUAL TO] 300 |
* Where signal equipment or last circuitry update is 10 years old or older.
Ill. Admin. Code tit. 92, § 1536.20