It's true that NC is the primary advocate for SEHSR defined as Charlotte-Raleigh-Richmond. The definition causes problems in NC politics because skeptics ask, "Who needs a high-speed train between Raleigh and Richmond?"
That said, I can't imagine that NC alone could pay for 110 mph Raleigh-Petersburg. It's even a stretch for NC to pay for 90 mph Charlotte-Raleigh and track capacity for 5x daily service. If budgets remain tight, NC will throw all available money at intrastate service.
From the perspective of Virginians, it's unclear that SEHSR would serve any station between Petersburg and the NC-VA line. Note also that SEHSR would terminate at Richmond Main Street, and there would have to be separate projects to improve trackage from RVM to Acca and beyond. Not much point in 110 mph Raleigh-RVM if you run 20 or 30 mph RVM-RVR.
To be clear, the SEHSR is defined as extending from DC to Charlotte via Richmond and Raleigh. It is simply broken into 3 segments: DC to RVM, RVM to Raleigh (which has a Teir II EIS awaiting a ROD from the FRA), and then Raleigh to Charlotte.
There is a $2.9 million HSIPR grant to DC DOT for the PE and NEPA fpr the Long Bridge replacement study to cover L'Enfant Plaza to Arlington and a $44.3 million HSIPR grant (FY10 funding) to VA DRPT for the Alexandria to Richmond Main Street Station segment. So there is funding to carry the DC to RVM segment through a Tier II EIS. VA is in a position to spend state money on specific track and capacity projects from Alexandria to RVM. For the DC to RVM segment, VA DRPT is likely to prioritize projects that benefit VRE & Amtrak between ALX and Frederickburg (the state has awarded a contract to build a 3rd track from south of Frederickburg to the new VRE Spotsylvania station), RVR to RVM for NPN & eventually NFK trains. The Long Bridge replacement will require a significant federal funding component to happen - which it may get via the FTA.
For the segment south of RVM, there will be an approved FEIS and preliminary design. VA could proceed with specific projects for Sections AA, BB, CC in the FEIS which cover the RVM to Collier Yard segment. DRPT has already allocated $80 million which I believe is mostly going a new bridge across the Appomattox which is the biggest part of the Section CC upgrades. BTW, the price tag estimate for the 11.3 miles of Section AA from the RVM platform to Centralia is $245 million.
The rest of the SEHSR RVM to Raleigh segment over the mostly abandoned S-Line will require a substantial federal passenger rail funding program to happen and who knows when that is going to be.
IIRC, when it came to Hampton Roads service, CSX said 90 would be fine while NS only wants 79. Of course, that may be a quirk of the routes and the potential passing siding situations.
Shifting back over to VA's stations, while a lot of them were lousy ten years ago, it's rather stunning looking at the march of ridership numbers since 2007. Really, vis-a-vis the national system the numbers are impressive...with some stations, it really has the feel of watching a flood tide inexorably rise. What is particularly stunning is the increases at stations on the Peninsula (which have seen no change in service over the last decade). Going down the WAS-NPN line, you get:
ALX: +73.7%
WDB: +41.9%
QAN: +28.1%
FBG: +30.4%
ASD: +86.2%
RVR: +47.3%
RVM: +174.4%
WBG: +40.4%
NPN: +41.4%
RVM is an obvious outlier, but at the start of FY07 service was relatively new. Parking at RVR can't be hurting RVM, either. After that, Ashland (another lower-ridership station) got a spike, followed by Alexandria (the only one to get two trains added). Most intriguing, though, is that the Peninsula stations (with no added service) got as much of an increase as the others did...assuming internal ridership is negligible, those three stations went from 151,171 to 230,265 (+52.3%). Basically, you've got about five cars full leaving RVM each day between the two trains.
Honestly, the 40-50% ridership hikes have probably been enough to make a touch-and-go parking situation a disaster, and a decent one touch-and-go. And I don't think this sort of march (especially since it seems to clearly go back a bit further) could have been foreseen given how the last 20 years had gone.
One common thread between the "hard spike" stations: Colleges. NPN serves CNU, ODU, NSU, and Hampton. WBG serves William and Mary. RVM serves VCU better than RVR does, though both can count for RU. ASD basically runs through the middle of campus. And woe betide the innocent traveler who tries to book on a day they all go on break...I've seen truly insane fares on those days just to get to DC, crowds over 150 at NPN and over 100 at WBG on a Saturday morning.
A rather worthwhile thought is how long this can continue before capacity becomes a problem. Parking is already a disaster at almost all the stations, though NPN can at least look to NFK as a bus feeder station. The thought of WBG trying to handle 100,000 passengers (or NPN trying to handle 200k) is kind of staggering. Probably more staggering, though, is that I could see these numbers starting to ramp up at the rate things have been going in VA. Going along with that is the fact that, as we've noted elsewhere, passenger service is moving into the black...and capacity constraints are becoming an issue (witness the Lynchburger, for example...I don't know how much room there /is/ for riders from ROA on it once they extend it, but there's probably not room to add another 50k to the train).