well since you invite the picking of nits
70 miles reflects the approx distance from the speedway to wdw
my reply is based on driving from WDW to PC using the most common route, SR-528 aka 'the Beachline Expressway'
the track is just off 95 at exit 261 and the Beachline crosses 95 at exit 205 so by mile markers the closest one gets to the speedway is 56 miles
however drawing an arc from the center of the speedway to the closest place it meets the Beachline (planned route), what sailors call CPA, I see 50.4 miles .... in round numbers
{this happens because 528 dips south at the 407 split about 15 miles west of the port and west of I-95 making the 'cpa' happen in the swamp area ...}
so "you won't be within 50 miles of the speedway" ... meaning at any point in the drive
once a navigator, always a navigator; not to mention a math major married to a CPA .... numbers are spoken here!