UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                  FORM 10-QSB/A

                QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

For the period ended September 30, 1999           Commission File Number 0-26056
---------------------------------------           ------------------------------

                           IMAGE SENSING SYSTEMS, INC.
             (Exact name of registrant as specified in its charter)

           Minnesota                                    41-1519168
  ------------------------------            ----------------------------------
  State of other jurisdiction of            I.R.S. Employer Identification No.
  incorporation organization

                             500 SPRUCE TREE CENTRE
                             1600 UNIVERSITY AVE. W.
                             ST. PAUL, MN 55104-3825
                    (Address of principal executive offices)
       Registrant's telephone number, including area code: (651) 603-7700


Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.
                                                            Yes  X    No

                      APPLICABLE ONLY TO CORPORATE ISSUERS:
Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practical date.

    Common Stock, $.01 Par Value -- 2,479,200 shares as of October 28, 1999.
    ------------------------------------------------------------------------


<PAGE>



                           IMAGE SENSING SYSTEMS, INC.

                                      INDEX

<TABLE>
<CAPTION>
           PART I.  FINANCIAL INFORMATION                                   Page No.
                                                                            --------

<S>                                                                          <C>
Item 1.    Condensed Consolidated Financial Statements:

           Condensed Consolidated Balance Sheets
           September 30, 1999 and December 31, 1998                              4

           Condensed Consolidated Statements of Operations
           Three- and nine-month periods ended September 30, 1999 and 1998       5

           Condensed Consolidated Statements of Cash Flows
           Nine-month periods ended September 30, 1999 and 1998                  6

           Notes to Condensed Consolidated Financial Statements                  7


Item 2.    Management's Discussion and Analysis of
           Results of Operations and Financial Condition                         8

           PART II.  OTHER INFORMATION

Item 4.    Other Information                                                     11

Item 6.    Exhibits and Reports on Form 8-K                                      11

           Signatures                                                            12
</TABLE>


                         SAFE HARBOR STATEMENT UNDER THE
                PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

         This Quarterly Report on Form 10-QSB/A contains forward-looking
statements within the meaning of Section 27A of the Securities Act of 1933, as
amended, and Section 21E of the Securities Exchange Act of 1934, as amended.
These forward-looking statements involve risks and uncertainties that may cause
the Company's actual results to differ materially from the results discussed in
the forward-looking statements. Factors that might cause such differences
include, but are not limited to, lack of market acceptance of the Company's
products; dependence on third parties for manufacturing and marketing
capabilities and continuing ability to pay royalties owed; inability of the




                                       2
<PAGE>

Company to diversify its product offerings; revenue fluctuations caused by the
Company's dependence on sales to governmental entities; failure of the Company
to secure adequate protection for the Company's intellectual property rights;
failure of the Company to respond to evolving industry standards and
technological changes; inability of the Company to properly manage growth in
revenue and/or production requirements; inability of the Company to meet its
future additional capital requirements; and control of the voting stock by
insiders. The forward-looking statements are qualified in their entirety by the
cautions and risk factors set forth in Exhibit 99, under the caption "Cautionary
Statement," to this Quarterly Report.



                                       3
<PAGE>


                         PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

                          IMAGE SENSING SYSTEMS, INC.
                     CONDENSED CONSOLIDATED BALANCE SHEETS



<TABLE>
<CAPTION>
                                                      September 30    December 31,
                                                         1999             1998
                                                      ------------    ------------
ASSETS                                                (Unaudited)        (Note)
<S>                                                   <C>             <C>
Current assets:
       Cash and cash equivalents                      $ 1,371,000     $ 1,326,000
       Accounts receivable                                850,000       1,402,000
       Inventories                                         87,000          74,000
       Prepaid expenses                                   130,000          32,000
       Deferred income taxes                               57,000          57,000
                                                      -----------     -----------
Total current assets                                    2,495,000       2,891,000

Property and equipment, net                               385,000         470,000

Other assets:
       Capitalized software development costs, net        880,000         856,000
       Deferred income taxes                              318,000         318,000
       Other                                               87,000              --
                                                      -----------     -----------
                                                        1,285,000       1,174,000
                                                      -----------     -----------
Total assets                                          $ 4,165,000     $ 4,535,000
                                                      ===========     ===========

LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
       Accounts payable                               $   263,000     $   296,000
       Accrued compensation                               181,000         270,000
       Deferred income                                     35,000         252,000
                                                      -----------     -----------
Total current liabilites                                  479,000         818,000

Deferred income tax liability                             366,000         366,000

Minority interest                                          80,000              --

Shareholders' equity:
       Common stock                                        25,000          25,000
       Additional paid-in capital                       3,890,000       3,890,000
       Retained earnings (deficit)                       (675,000)       (564,000)
                                                      -----------     -----------
                                                        3,240,000       3,351,000
                                                      -----------     -----------

Total liabilities and shareholders' equity            $ 4,165,000     $ 4,535,000
                                                      ===========     ===========
</TABLE>

Note: The balance sheet at December 31, 1998 has been derived from the audited
financial statements at that date but does not include all of the information
and footnotes required by generally accepted accounting principles for complete
financial statements.


                                       4
See accompanying notes

<PAGE>

                           IMAGE SENSING SYSTEMS, INC.
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (UNAUDITED)





<TABLE>
<CAPTION>
                                                Three-Month Period Ended         Nine-Month Period Ended
                                                      September 30                     September 30
                                              ---------------------------     ---------------------------
                                                  1999            1998           1999            1998
                                              ---------------------------     ---------------------------

<S>                                           <C>             <C>             <C>             <C>
REVENUE:
       Product sales                          $   268,000     $   222,000     $ 1,044,000     $   733,000
       Royalties                                  608,000         344,000       1,996,000       1,313,000
       Consulting services                         19,000         111,000         142,000         178,000
                                              ---------------------------     ---------------------------
                                                  895,000         677,000       3,182,000       2,224,000

COSTS OF REVENUE:
       Product sales                              161,000          80,000         538,000         342,000
       Royalties                                   63,000          40,000         215,000         150,000
       Consulting services                         10,000          41,000          58,000          66,000
                                              ---------------------------     ---------------------------
                                                  234,000         161,000         811,000         558,000
                                              ---------------------------     ---------------------------
Gross profit                                      661,000         516,000       2,371,000       1,666,000

OPERATING EXPENSES:
       Selling, general and administrative        751,000         522,000       2,117,000       1,680,000
       Research and development                    53,000              --         422,000              --
                                              ---------------------------     ---------------------------
                                                  804,000         522,000       2,539,000       1,680,000
                                              ---------------------------     ---------------------------
Income (loss) from operations                    (143,000)         (6,000)       (168,000)        (14,000)

Other income, net                                  17,000          23,000          57,000          78,000
                                              ---------------------------     ---------------------------
Income (loss) before income taxes                (126,000)         17,000        (111,000)         64,000
Income taxes                                           --              --              --              --
                                              ---------------------------     ---------------------------
Net income (loss)                             $  (126,000)    $    17,000     $  (111,000)    $    64,000
                                              ===========================     ===========================

Net income (loss) per common share-basic
and diluted                                   $     (0.05)    $      0.01     $     (0.04)    $      0.03
                                              ===========================     ===========================

Weighted average number of common
shares outstanding
Basic                                           2,479,200       2,482,000       2,479,200       2,481,000
                                              ===========================     ===========================
Diluted                                         2,479,200       2,482,000       2,479,200       2,484,000
                                              ===========================     ===========================
</TABLE>


See accompanying notes


                                       5
<PAGE>

                          IMAGE SENSING SYSTEMS, INC.
                CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                  (UNAUDITED)




<TABLE>
<CAPTION>
                                                            Nine-Month Period Ended
                                                                  September 30
                                                          ---------------------------
                                                              1999           1998
                                                          ---------------------------

<S>                                                       <C>             <C>
OPERATING ACTIVITIES:
         Net income (loss)                                $  (111,000)    $    64,000
         Adjustments to reconcile net income (loss) to
             net cash provided by operating activities        365,000         249,000
                                                          ---------------------------
         Net cash provided by operating activities            254,000         313,000


INVESTING ACTIVITIES:
         Purchase of property and equipment                   (78,000)        (70,000)
         Other                                                (10,000)
         Capitalized software development costs              (121,000)       (825,000)
                                                          ---------------------------
         Net cash used in investing activities               (209,000)       (895,000)


FINANCING ACTIVITIES:
         Proceeds from exercise of stock option                    --           4,000
                                                          ---------------------------
         Net cash provided by financing activities                 --           4,000
                                                          ---------------------------

Increase (decrease) in cash and cash equivalents               45,000        (578,000)

Cash and cash equivalents, beginning of period              1,326,000       2,000,000
                                                          ---------------------------
Cash and cash equivalents, end of period                  $ 1,371,000     $ 1,422,000
                                                          ===========================
</TABLE>


See accompanying notes


                                       6
<PAGE>




                           IMAGE SENSING SYSTEMS, INC.

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)
                               September 30, 1999

Note A:  Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been
prepared in accordance with generally accepted accounting principles for interim
financial information and with the instructions to Form 10-QSB. Accordingly,
they do not include all of the information and footnotes required by generally
accepted accounting principles for complete financial statements. In the opinion
of management, all adjustments (consisting of normal recurring accruals)
considered necessary for a fair presentation have been included. Operating
results for the three- and nine-month periods ended September 30, 1999 are not
necessarily indicative of the results that may be expected for the year ending
December 31, 1999. For further information, refer to the financial statements
and footnotes thereto for the year ended December 31, 1998.


Note B: Restatement

The company has restated its financial statements for the three and nine months
ended September 30, 1999 to reflect the capitalizing of software development
costs. The capitalization of these costs is consistent with 1998 and with
Statement of Financial Accounting Standards No. 86.

The company's research and development expense was restated from $174,000 to
$53,000 in the third quarter and year to date from $563,000 to $422,000. The
company's net loss for the third quarter was restated from $247,000 or $.10 per
share to $126,000 or $.05 per share. The year to date loss was restated from
$232,000 or $.09 per share to $111,000 or $.05 per share.



                                       7
<PAGE>


Item 2.

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  RESULTS OF OPERATIONS AND FINANCIAL CONDITION

            (Three- and Nine-month Periods Ended September 30, 1999)


Revenue for the third quarter of 1999 was $895,000, an increase of 32% from
$677,000 for the same period a year ago, while revenue for the nine-month period
ended September 30, 1999 was $3,182,000, an increase of 43% from $2,224,000 a
year ago. The increase in revenue from product sales and royalties for these
periods was due primarily to more sales of Autoscope(R) systems by both Image
Sensing Systems, Inc. (ISS) and its North American distributor, Econolite
Control Products, Inc. (Econolite). Unit sales by ISS and Econolite increased
88% for the third quarter and have increased 63% for the nine-month period ended
September 30, 1999, compared to the same periods a year ago. Revenue from direct
sales and royalties for the third quarter of 1999 increased 21% and 77%,
respectively, compared to the third quarter of 1998. Revenue from direct sales
and royalties for the nine-month period ended September 30, 1999 increased 42%
and 52%, respectively, compared to a year ago.

Gross profit was $661,000 in the third quarter of 1999, or 74% of revenue,
compared to $516,000, or 76% of revenue, for the same period a year ago. Gross
profit for the nine-month period ended September 30, 1999 was $2,371,000, or 75%
of revenue, compared to $1,666,000, or 75% of revenue, for the same period a
year ago.

Selling, general and administrative expenses were $751,000 and $2,117,000,
respectively, for the three- and nine-month periods ended September 30, 1999,
compared to $522,000 and $1,680,000, respectively, for the same periods a year
ago. The increases were due primarily to added efforts in business development
and amortization of software development costs which began in October 1998.

Research and development expenses as restated were $53,000 and $422,000,
respectively, for the three- and nine-month periods ended September 30, 1999,
compared to none for the same periods a year ago. The reduction in research and
development expenses reported earlier, reflect capitalized costs associated with
new products for the Autoscope Solo(TM) program. This is being done to be
consistent with Accounting Standards No. 86. The net increase from 1998 to 1999
resulted because all development efforts in the first nine months of 1998 were
directed toward software development for the new Autoscope Solo product with
associated costs capitalized in accordance with Statement of Financial
Accounting Standards No. 86.

Loss from operations as restated was $143,000 and $168,000, respectively, for
the three- and nine-month periods ended September 30, 1999, compared to $6,000
and $14,000 for the same periods a year ago. The increase in operating losses
was due primarily to



                                       8
<PAGE>

research and development costs incurred in 1999 compared to 1998 and an increase
in business development expense in 1999.

Other income, net, was $17,000 and $57,000, respectively, for the three- and
nine-month periods ended September 30, 1999, compared to $23,000 and $78,000,
respectively, for the same periods a year ago. The decrease resulted primarily
from holding less cash in interest bearing cash equivalents during the first
nine months of 1999.

The Company does not expect to receive any current income tax benefit from
losses incurred in 1999.

Liquidity and Capital Resources:
-------------------------------

Cash provided by operating activities was $254,000 for the nine-month period
ended September 30, 1999, compared to $313,000 for the same period in 1998. The
reduced cash flow from operations in the nine-month period ended September 30,
1999 was primarily due to an unusually large collection on accounts receivable
in 1998 compared to 1999.

Capital expenditures were $78,000 for the nine-month period ended September 30,
1999, which is comparable to 1998. The Company does not expect to make
significant changes to the level of investments in capital expenditures for the
balance of 1999. The Company is incurring software development costs that have
been capitalized. As restated as of September 30, 1999 $121,000 has been
capitalized, versus $825,000 in such costs that were incurred in the nine-month
period ended September 30 1998.

Management believes that its cash and investment position, anticipated cash
flows from operations, and funds available through its bank line of credit will
be sufficient to meet working capital requirements for current operations and
planned new product introductions for the foreseeable future.

Impact of the Year 2000 Issue
-----------------------------

The Year 2000 Issue is the result of computer programs being written using two
digits rather than four to define the applicable year. Some computer programs
that have date-sensitive software may recognize a date using "00" as the year
1900 rather than the year 2000. All of the software produced by the Company has
been analyzed and the Company is not aware of any potential for date recognition
problems in its products. However, the Company also uses off-the-shelf software
produced by third parties for use in administrative functions such as word
processing, network administration, voice mail messaging, billing and record
keeping. In the event, that any of such programs are susceptible to date
recognition problems, this could result in a system failure or miscalculations
causing disruption of operations, including, among other things, intra-



                                       9
<PAGE>

company communications, preparation of invoices and collection of accounts
receivables, and many other normal business activities.

The Company has made every attempt to identify all relevant software that may
affect the Company's operations through surveys and examination. Based on risk
assessments that have been completed for the majority of the Company's
operations, the Company converted the majority of its business operations to new
Year 2000 compatible software by a combination of conversion to new software and
upgrading existing software. The cost of these conversions to date has not been
material. However, there can be no guarantee that a failure to convert by
another company, or a conversion that is incompatible with the Company's
systems, would not have a material adverse effect on the Company.




                                       10
<PAGE>


PART II: OTHER INFORMATION

Item 1.           Legal Proceedings
                  -----------------

                  Not applicable

Item 2.           Changes in Securities
                  ---------------------

                  Not applicable

Item 3.           Defaults upon Senior Securities
                  -------------------------------

                  Not applicable

Item 4.           Submission of Matters to a Vote of Security Holders
                  ---------------------------------------------------

                  Not applicable

Item 5.           Other Information
                  -----------------

                  Not applicable

Item 6.           Exhibits and Reports on Form 8-K
                  --------------------------------

                  (a)  Exhibits
                       --------

                  The following exhibits were filed as part of the quarterly
                  report on Form 10-QSB for the quarterly period ended
                  September 30, 1999:

                  27       Financial Data Schedule
                  99       Cautionary Statement

                  (b)  Reports
                       -------

                  No reports on Form 8-K were filed during the quarter covered
                  by this Form 10-QSB/A




                                       11
<PAGE>


                                   SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its bethree quarters by
the undersigned thereunto duly authorized.


                                   Image Sensing Systems, Inc.
                                   --------------------------------------------
                                   (Registrant)


Dated: February 10, 2000             /s/ William L. Russell
                                   --------------------------------------------
                                   William L. Russell
                                   President and Chief Executive Officer
                                   (principal executive officer)


Dated: February 10, 2000             /s/ Jeffrey F. Martin
                                   --------------------------------------------
                                   Jeffrey F. Martin
                                   Chief Financial Officer
                                   (principal financial and accounting officer)