I'm working on an addition to a school. Use group E, 2-B, fully sprinklered. part of the addition is extending a corridor and an exit. I'm trying to calculate the new exit access travel distance and I'm not sure where to measure it from. There is a existing gym that has 4 exits, one of which is this corridor that is being extended. If i take my line from the back corner of the gym (as implied by 1017.3), opposite from the the extended corridor then my travel distance is over 250'. My issue is that from that point there are 2 closer exits well under the 250' travel distance (one exit is less than 100' from that point). my interpretation In the past is to take the measurement from the center of the space which seems to be the most remote point where you have multiple choices. If I measure from the center of the gym, then my travel distance to all 4 exits is well under 250' and less than 200' for the addition. I'm not sure how to interpret 1017.3 where there are multiple exits.