Here you'll find maps and driving directions to ASTi. Looking for somewhere to grab a bite to eat? Check out the town of Herndon's Restaurant directory. If you're coming for a training course, or just to visit, these may be of some help.

If you'd rather use an online service, our address is 500A Huntmar Park Drive, Herndon, VA 20170. Try Mapquest or Google Maps (our favorite).

Click on any map image to enlarge it in a new window.

Regional Level	Town Level	Street Level

As of January, 2010
Current construction at the I-95/I-395/I-495 Springfield interchange may affect the accuracy of these driving directions. We'll try to keep on top of things, but be warned that these directions may not be 100% accurate as the roadwork progresses.

1. Head East toward Washington on the Dulles Access Road (267), approximately three (3) miles.
2. Take Exit 11 for the Fairfax County Parkway (7100).
3. From the exit ramp, turn left at the traffic light onto the Fairfax Co. Parkway (7100); you are now heading North.
4. Immediately proceed straight through the first traffic light.
5. Turn left at the second traffic light to get on Spring Street.
6. The off-ramp will curve left, and there will be another traffic light where the off-ramp meets Spring Street. Both lanes can turn right, but only the right-most lane allows right-turn-on-red.
7. Turn right onto Spring Street.
8. Proceed straight through the first traffic light at Herndon Parkway.
9. Turn right at the next traffic light at Huntmar Park Drive.
10. Take the first right into the parking lot, and follow around to the right to find parking. ASTi's offices are in suite 500A, with main entry facing Huntmar Park Drive.

1. The Airport exit leads you to the George Washington Memorial Parkway. Stay on the Parkway, heading North.
2. Travel North approximately 13 miles, then get on I-495 West/South toward Northern Virginia/Tysons Corner (do not exit for Baltimore or Maryland).
3. At Exit 45A, go West on the Dulles Toll Road (267) for approximately 11 miles. Make sure you don't get on the Dulles Access Road (inner lanes), which is direct to Dulles Airport. Tolls are $1.00 and $0.75.
4. Take Exit 11 for the Fairfax County Parkway (7100).
5. After the tollbooth, turn right onto the Fairfax Co. Parkway (7100); you are now heading North.
6. Turn left at the first traffic light to get on Spring Street.
7. The off-ramp will curve left, and there will be another traffic light where the off-ramp meets Spring Street. Both lanes can turn right, but only the right-most lane allows right-turn-on-red.
8. Turn right onto Spring Street.
9. Proceed straight through the first traffic light at Herndon Parkway.
10. Turn right at the next traffic light at Huntmar Park Drive.
11. Take the first right into the parking lot, and follow around to the right to find parking. ASTi's offices are in suite 500A, with main entry facing Huntmar Park Drive.

1. Travel West on Route 7 (a.k.a. Leesburg Pike) for approximately 7 miles to the traffic light at Baron Cameron Ave (606).
2. Turn left on Baron Cameron Ave. (606) and travel for about 4 miles. You will pass under the overpass for Fairfax County Parkway (7100). Baron Cameron Ave. becomes Elden Street once you enter the Town of Herndon.
3. At the third traffic light after the overpass, turn left onto Herndon Parkway.
4. Continue straight through the traffic light at Grove Street.
5. Turn right at the next light onto Spring Street.
6. Turn right at the first traffic light at Huntmar Park Drive.
7. Take the first right into the parking lot, and follow around to the right to find parking. ASTi's offices are in suite 500A, with main entry facing Huntmar Park Drive.

1. Travel South on I-95 toward Washington until reaching the interchange for I-495 West/South, toward Bethesda, Silver Spring.
2. Travel West/South on I-495 into Virginia, and take Exit 45A for the Dulles Toll Road (267).
3. Head West on the Dulles Toll Road (267) for approximately 11 miles. Make sure you don't get on the Dulles Access Road (inner lanes), which is direct to Dulles Airport. Tolls are $1.00 and $0.75.
4. Take Exit 11 for the Fairfax County Parkway (7100).
5. After the tollbooth, turn right onto the Fairfax Co. Parkway (7100); you are now heading North.
6. Turn left at the first traffic light to get on Spring Street.
7. The off-ramp will curve left, and there will be another traffic light where the off-ramp meets Spring Street. Both lanes can turn right, but only the right-most lane allows right-turn-on-red.
8. Turn right onto Spring Street.
9. Proceed straight through the first traffic light at Herndon Parkway.
10. Turn right at the next traffic light at Huntmar Park Drive.
11. Take the first right into the parking lot, and follow around to the right to find parking. ASTi's offices are in suite 500A, with main entry facing Huntmar Park Drive.

1. Travel North on I-95 toward Washington to the Springfield interchange, where I-95, I-395, and I-495 converge.
2. Take the exit to head West/North on I-495 toward Tysons Corner. Do not exit heading East toward Maryland/Baltimore.
3. Travel West/North on I-495 to Exit 45 for Dulles Toll Road (267); this is a left-side exit, so be prepared.
4. Head West on the Dulles Toll Road (267) for approximately 11 miles. Make sure you don't get on the Dulles Access Road (inner lanes), which is direct to Dulles Airport. Tolls are $1.00 and $0.75.
5. Take Exit 11 for the Fairfax County Parkway (7100).
6. After the tollbooth, turn right onto the Fairfax Co. Parkway (7100); you are now heading North.
7. Turn left at the first traffic light to get on Spring Street.
8. The off-ramp will curve left, and there will be another traffic light where the off-ramp meets Spring Street. Both lanes can turn right, but only the right-most lane allows right-turn-on-red.
9. Turn right onto Spring Street.
10. Proceed straight through the first traffic light at Herndon Parkway.
11. Turn right at the next traffic light at Huntmar Park Drive.
12. Take the first right into the parking lot, and follow around to the right to find parking. ASTi's offices are in suite 500A, with main entry facing Huntmar Park Drive.