Sprinting on the Road is not as different as people are saying.
this is the first year I've done much crit racing in a while and since it is essentially a fitness supplement to my track program i decided to build a bike that more closely resembled my track bike. so- Single Speed drive train, 165mm cranks, 36cm Track Bars.. for me- road drivetrains always felt inefficient, likely due to my inexperience with them- and inability to settle on my optimum gearing during the wind-up.. I think aligning my bikes has allowed me to get road numbers closer to track.. but that could just be a personal thing.
that said- i do never see max power numbers in crits that i see in a track 200m- generally 20-25% lower.. i assume thats a factor of the jump occurring at higher speeds.. not sure.. also 25" power, which i believe is the determining metric for 200m, is lower as well.. my take is the shielded wind up, higher jumping speed leaves an effort that is mostly sustained speed maintenance.. I am also not seeing my highest maximal power in moto paced jump drills that i do on the track
as for the ATP- the fact that it stays essentially fresh through sustained longer efforts is exactly why i do flying 100/200 efforts at the end of the day, after kilo efforts. in my experience its the lactic system that takes the hit during the course of training- that though could lead to decreased speed maintenance in road sprints..