**EXHIBIT 21**

**QUIXOTECORPORATION AND SUBSIDIARIESSUBSIDIARIES OF THE COMPANYas of June 30, 2007**

| ** **                                               | ** ** | **Jurisdiction**           |
|----------------------------------------------------------|------------|----------------------------|
| ** **                                               | ** ** | **Under Which**            |
| **QUIXOTE CORPORATION (PARENT)**                         | ** ** | ** **                 | ** ** | **Organized** |
|                                                     |       |                       |
| Quixote Transportation  Safety, Inc.                |       | Delaware                   |
| TranSafe Corporation                                     |       | Delaware                   |
| Nu-Metrics, Inc.                                    |       | Pennsylvania               |
| Highway Information Systems, Inc.                   |       | Delaware                   |
| Surface Systems, Inc.                               |       | Missouri                   |
| Sensing Systems, Ltd.                                    |       | United Kingdom             |
| U.S. Traffic Corporation                                 |       | Delaware                   |
| Quixote Transportation Safety Mexico S. de R.L. de  C.V. |       | Mexico                     |
| Energy Absorption Systems, Inc.                     |       | Delaware                   |
| E-Tech Testing Services, Inc.                       |       | Delaware                   |
| Energy Absorption Systems (Europe), Inc.            |       | Delaware                   |
| Quixote Asia Pacific, Inc.                          |       | Delaware                   |
| Quixote Europe, Inc. Delaware                       |       | Delaware                   |
| Energy Absorption Systems (AL) LLC                       |       | Delaware                   |
| Peek Traffic Corporation                                 |       | Delaware                   |
| Quixote International Enterprises, LLC.                  |       | Delaware                   |
| Quixote (Beijing) Co., Ltd                               |       | Peoples Republic of  China |
| Quixote Traffic  Corporation                             |       | Delaware                   |
| Quixote  Transportation Technologies, Inc.          |       | Delaware                   |
| Quixote Foreign  Sales, Inc.                        |       | U.S. Virgin  Islands       |
| Quixote Latin  America, Inc.                        |       | Delaware                   |
| Quixote Middle  East/Africa, Inc.                   |       | Delaware                   |
|                                                          |            |                            |  |  |

 

Quixote Transportation Safety, Inc., QuixoteTraffic Corporation, Quixote Transportation Technologies, Inc., QuixoteLatin America, Inc., Quixote Middle East/Africa, Inc. and QuixoteForeign Sales Corporation are wholly-owned by Quixote Corporation.

TranSafe Corporation, Surface Systems, Inc., U.S.Traffic Corporation, Peek Traffic Corporation, Energy Absorption Systems, Inc.and Quixote International Enterprises, LLC are wholly-owned by QuixoteTransportation Safety, Inc.

All subsidiaries listed under TranSafe Corporation,Surface Systems, Inc., U.S. Traffic Corporation, Energy Absorption Systems, Inc.and Quixote International Enterprises, LLC are wholly-owned by thosecorporations.

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