No person may operate any motor vehicle on the site unless he holds a current operator's license, nor may he, if operating a motor vehicle on the site, refuse to exhibit for inspection, upon request of a uniformed guard, his operator's license or proof of registration of the vehicle under his control at time of operation.

(a) No person shall drive a motor vehicle on the site at a speed greater than or in a manner other than is reasonable and prudent for the particular location, given the conditions of traffic, weather, and road surface and having regard to the actual and potential hazards existing.

(b) Except when a special hazard exists that requires lower speed for compliance with paragraph (a) of this section, the speed limit on the site is 25 m.p.h., unless another speed limit has been duly posted, and no person shall drive a motor vehicle on the site in excess of the speed limit.

No person shall fail or refuse to yield the right-of-way to an emergency vehicle when operating with siren or flashing lights.

Every driver shall comply with all posted traffic and parking signs.

No person shall fail or refuse to yield the right-of-way to a pedestrian or bicyclist crossing a street in a marked crosswalk.

No person, unless otherwise authorized by a posted traffic sign or directed by a uniformed guard, shall stand or park a motor vehicle:

(a) On a sidewalk;

(b) Within an intersection or within a crosswalk;

(c) Within 15 feet of a fire hydrant, 5 feet of a driveway or 30 feet of a stop sign or traffic control device;

(d) At any place which would result in the vehicle being double parked;

(e) At curbs painted yellow;

(f) In a direction facing on-coming traffic;

(g) In a manner which would obstruct traffic;

(h) In a parking space marked as not intended for his use;

(i) Where directed not to do so by a uniformed guard;

(j) Except in an area specifically designated for parking or standing;

(k) Except within a single space marked for such purposes, when parking or standing in an area with marked spaces;

(l) At any place in violation of any posted sign; or

(m) In excess of 24 hours, unless permission has been granted by the Physical Security office.

No person, except visitors, shall park a motor vehicle on the site without having a valid parking permit displayed on such motor vehicle in compliance with instructions of the issuing authority. Such permits may be revoked by the issuing authority for violation of any of the provisions of this part.

No person shall make nonemergency repairs on privately owned vehicles on the site.

No person shall leave a motor vehicle unattended on the site with the engine running or a key in the ignition switch or the vehicle not effectively braked.

Any motor vehicle that is parked in violation of these regulations may be towed away or otherwise moved if a determination is made by a uniformed guard that it is a nuisance or hazard. A reasonable amount for the moving service and for the storage of the vehicle, if any, may be charged, and the vehicle is subject to a lien for that charge.

Except as otherwise provided herein, no person shall drive a motor vehicle or bicycle onto the site for the sole purpose of using the roads of the site as a thoroughfare between roads bordering the site. This section shall not apply to bicyclists using officially approved bike paths on the site.

No person shall ride a bicycle other than in a manner exercising due caution for pedestrian and other traffic. No person shall ride a bicycle on sidewalks or inside any building, nor shall any person park a bicycle on sidewalks or inside any building nor in a roadway or parking lot, provided, however, that these parking restrictions shall not apply to bicycles parked at bicycle racks located in these areas.