Exhibit
31.2

CERTIFICATION
PURSUANT TO
SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I,
Gregory R.L. Smith, certify that:

1.
I have reviewed this Quarterly Report on Form 10-Q of Image Sensing Systems,
Inc. for its fiscal quarter ended March 31, 2011;

2.
Based on my knowledge, this report does not contain any untrue statement of a
material fact or omit to state a material fact necessary to make the statements
made, in light of the circumstances under which such statements were made, not
misleading with respect to the period covered by this report;

3.
Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material respects
the financial condition, results of operations and cash flows of the registrant
as of, and for, the periods presented in this report;

4.
The registrants other certifying officer and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial
reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the
registrant and have:

| |                                                                                                                                                                                                                                                                                                                                                                                                 
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | (a)
 Designed such disclosure controls and procedures, or caused such disclosure
 controls and procedures to be designed under our supervision, to ensure that
 material information relating to the registrant, including its consolidated
 subsidiaries, is made known to us by others within those entities, particularly
 during the period in which this report is being prepared;         
| |                                                                                                                                                                                                                                                                                                                                                                                                 
| | (b)
 Designed such internal control over financial reporting, or caused such
 internal control over financial reporting to be designed under our
 supervision, to provide reasonable assurance regarding the reliability of
 financial reporting and the preparation of financial statements for external
 purposes in accordance with generally accepted accounting principles;                
| |                                                                                                                                                                                                                                                                                                                                                                                                 
| | (c)
 Evaluated the effectiveness of the registrants disclosure controls and
 procedures and presented in this report our conclusions about the
 effectiveness of the disclosure controls and procedures, as of the end of the
 period covered by this report based on such evaluation; and                                                                                                     
| |                                                                                                                                                                                                                                                                                                                                                                                                 
| | (d)
 Disclosed in this report any change in the registrants internal control over
 financial reporting that occurred during the registrants most recent fiscal
 quarter (the registrants fourth fiscal quarter in the case of an annual
 report) that has materially affected, or is reasonably likely to materially
 affect, the registrants internal control over financial reporting; and

5.
The registrants other certifying officer and I have disclosed, based on our
most recent evaluation of internal control over financial reporting, to the
registrants auditors and the audit committee of the registrants board of
directors (or persons performing the equivalent functions):

| |                                                                                                                                                                                                                                                                                  
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | (a) All significant
 deficiencies and material weaknesses in the design or operation of internal
 control over financial reporting which are reasonably likely to adversely
 affect the registrants ability to record, process, summarize and report
 financial information; and
| |                                                                                                                                                                                                                                                                                  
| | (b) Any fraud, whether or not
 material, that involves management or other employees who have a significant
 role in the registrants internal control over financial reporting.                                                                                                 

Date: May 12, 2011

| |                                
| | -------------------------------
| | /s/ Gregory R.L. Smith         
| | Name: Gregory R.L. Smith       
| | Title: Chief Financial
 Officer

---