Hi John T!
Actually, was assuming initial condition ADSA=TORA=TODA. Then simply adding a piece of land qualifying as clearway, but not stopway. So I got to ASDA < TODA > TORA. Therefore, I tried only to answer the part relating to increasing clearway above zero, trying to avoid confusing the question with how much clearway you can use.
Makes senes or not
?
Brgds,
Empty CRS