101 is a quarter mile from the track parking lot, but they need more entrances and exits from the parking lot. 101 is four-lane, limited access from Manchester to I-95, more than adequate to handle raceday traffic.
The big problem is pit area - it's packed to the gills with an IHRA national event, and that's with a relatively low number of Pro teams compared with an NHRA national event. Other problem areas: no suites, small tower, tiny grandstands, spectator traffic crosses the staging lanes to get to the pits and grandstands, there is limited pit paving. All fixable, just bring lots and lots of money (the Baders have spent about twice their initial estimate and aren't done yet).
Bruton Smith has soured on building dragstrips, by the way - he's discovered his returns at Bristol don't cover the construction costs nearly as quickly as does the oval track - after all, when you can pack in 150,000 for a single day at higher ticket prices than 50,000 spread over three days, the math is pretty simple. And when you can do the 150,000 trick twice a year instead of just once, the return on investment really tips toward the oval track. So don't look for a dragstrip at Charlotte any time soon - if ever. Vegas is a different picture, but that's a 12-month facility with two NHRA drag races a year and the track is busy almost every weekend.